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Jim Prentiss
Joined: 01 Dec 2009
Posts: 103
Location: Ohio
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 Posted: Dec 03, 2009 14:29 Post subject: Collection of Jim Prentiss |
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Thank you Jordi for the oportunity to publish some of my mineral photos. I should be able to comply with the requirement of mostly lesser quality piecees as I only have a few good specimens. Again all the public displays I have seen to date make my collection look like gravel.
So here goes with my first submission.
Nephrite Jade (Actinolite) this piece is 6" x 5" x 4.5" it weighs about 5 pounds. It is obviously cut out of a larger piece that was nearly twenty pounds. I picked it up the summer of 1991 near Kobuk, a village in western , Alaska, along the Kobuk River.
Jim Prentiss
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39756 Time(s) |
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Jim Prentiss
Joined: 01 Dec 2009
Posts: 103
Location: Ohio
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| Posted: Dec 03, 2009 14:47 Post subject: Re: Collection of Jim Prentiss |
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This next one maybe a little too simple, but I enjoy the color. It is obviously massive Calcite and I got in a little rock shop in Anchorage, Alaska, with a label that said "Mexico"
Anyone out there have a better idea from where in Mexico?
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| It is about 2.5" (6.4cm) in diameter about an inch (2.54 cm) thick. |
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39711 Time(s) |
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Jim Prentiss
Joined: 01 Dec 2009
Posts: 103
Location: Ohio
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| Posted: Dec 03, 2009 14:59 Post subject: Re: Collection of Jim Prentiss |
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Perhaps most everyone can recognize the characteristic habit of this piece of Galena from Dal'Negorsk, Far Eastern Russia. the field of view here is 1.5" (3.8cm).
Its departure from the normal (cubic) habit is the primary reaason I grabbed this one up when I saw in my local rock shop.
I have yet to master the art of photographing bright metallic minerals
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39738 Time(s) |
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Carles Millan
Site Admin
Joined: 05 May 2007
Posts: 1471
Location: Catalonia
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| Posted: Dec 03, 2009 15:07 Post subject: Re: Collection of Jim Prentiss |
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Hi Jim!
Thanks for posting your minerals here.
Please, could you provide the size of this specimen?: Calcite 32.JPG
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Jim Prentiss
Joined: 01 Dec 2009
Posts: 103
Location: Ohio
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| Posted: Dec 03, 2009 15:12 Post subject: Re: Collection of Jim Prentiss |
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Sorry Carles,
I saw that after I sent it off. It is about 2.5" (6.4cm) in diameter about an inch (2.54 cm) thick.
Jimp
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Jim Prentiss
Joined: 01 Dec 2009
Posts: 103
Location: Ohio
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| Posted: Dec 03, 2009 15:22 Post subject: Re: Collection of Jim Prentiss |
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I am fastinated by different crystal habits and a favorite is this pinkish Halite hopper crystal cluster from Searles Lake, in California, that I got from a rock shop in Alaska about six years ago. This specimen is 5.5" x 5.5" x 1.5" (14.0cm x 14.0cm x 3.8cm)
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39791 Time(s) |
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Carles Millan
Site Admin
Joined: 05 May 2007
Posts: 1471
Location: Catalonia
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| Posted: Dec 03, 2009 15:27 Post subject: Re: Collection of Jim Prentiss |
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Jim,
In order to save space and especially to prevent from sending too many notifications to the FMF readers, it is strongly recommended to group several photos in one single posting. After uploading the first, just click again on the "Add Attachment" button and repeat the process to add as many pictures as you want, to a maximum of fifteen per post. As you will see, the order in which the photos are finally shown is the opposite to the order you uploaded them.
If needed, you can write specific comments for each photo in the "File Comment" box.
Thanks again for posting here,
_________________
Al carrer Duran i Bas, si no hi vas no t'hi duran |
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Pete Richards
Site Admin
Joined: 29 Dec 2008
Posts: 828
Location: Northeast Ohio
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| Posted: Dec 03, 2009 17:09 Post subject: Re: Collection of Jim Prentiss |
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| Jim Prentiss wrote: | Perhaps most everyone can recognize the characteristic habit of this piece of Galena from Dal'Negorsk, Far Eastern Russia. the field of view here is 1.5" (3.8cm).
Its departure from the normal (cubic) habit is the primary reaason I grabbed this one up when I saw in my local rock shop.
I have yet to master the art of photographing bright metallic minerals |
This appears to me to be a spinel twin of galena. Spinel twinning is twinning on the body diagonal of the cube, and is named of course for the triangular twins of spinel. In galena, spinel twinning tends to produce flat crystals with strong hexagonal and/or triangular aspects.
_________________
Collecting and studying crystals with interesting habits, twinning, and epitaxy |
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Jim Prentiss
Joined: 01 Dec 2009
Posts: 103
Location: Ohio
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| Posted: Dec 05, 2009 13:24 Post subject: Re: Collection of Jim Prentiss |
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Hello Again everyone,
Here are several more of my pieces for the display. I see what you were talking about Carles. I can keep adding as I go, then sumbit numerous photos at once
Here goes.
Jimp
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| This is a small specimen of Biege colored Crandallite on matrix from Mont-Des-Groseillers, Belgium (I hope I spelled and punctuated that correctly). This too has an interesting habit. It is 1" x 3/4" x 1/2" (2.5cm x 1.9cm x 1.3cm) |
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39489 Time(s) |
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| This bronze flaky Coalingite, from the type locality in Fresno Co., California, is like most of my type locality speimens, not especially pretty, but like the orange Calite it has a good color. The flakes are very tiny and the field of veiw in the photo is 1" (2.5cm) |
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39495 Time(s) |
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| I have mentioned that I am fsatinated by different habits, this Opal (Hyalite) is an example of my favorite habit(s), botryoidal, reniform, mammillary. Freud would probably say it was because I was bottle fed. In addition to the habit, though, is the near water clear transparency. This piece is from the Czech Republic. It measures 1 1/2" x 1" x 1" (2.8cm x 2.5cm x 2.5cm) |
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39473 Time(s) |
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| I like this Kernite because it is simple and was a new mineral for me. it is a bit difficult to display at it is 10 1/2" x 4/12" 3" (26.6cm x 11.4cm x 7.6cm). It is from kern Co., California. I purchased this piece a few years ago at the Alaska Miners Convention Rock and Mineral show. |
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39481 Time(s) |
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| The crystals here of Stibnite are very small averaging 1/8" to 3/8" (3mm to 9mm) in length. The specimen is from , the aptly named, Stibnite Creek SW of the town of Tok, Alaska. I picked tis one up in 1996. It is 2 3/4" x 1 1/2" x 1 1/2" (11.4cm x 3.8cm x 3.8cm) |
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39506 Time(s) |
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| This is a rather thick carpet of Aragonite from Eklutna Lake, Near Anchorage, Alaska I picked up at the Alaska Miners Convention a couple years back - It is 4" x 2 3/4" x 2" (11.4cm x 6.9cm x 5.1cm) |
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39524 Time(s) |
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| This Hanksite crystal is from the type locality at Searles Lake, San Bernardino Co., California. It is 5" x 4 1/2" in Diameter (12.7cm x 11.4cm) |
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39504 Time(s) |
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| This bright green "jackstraw" crystal aggregate of Actinolite I picked up along the Kobuk River near the Village of Deering in western Alaska in 1994. It is 4 1/2" x 3" x 2 1/2" (11.7cm x 7.6cm x 6.4cm) |
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39552 Time(s) |
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Ed Huskinson
Joined: 15 Apr 2009
Posts: 318
Location: Kingman, Arizona
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| Posted: Dec 05, 2009 14:40 Post subject: Re: Collection of Jim Prentiss |
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Hey Jim. I like the actinolite. Self-collected, colorful, and it is 'way cool (as the kids say now-a-days). Keep 'em coming. Have you anything from Wrangell or Prince of Wales Island by any chance?
Thanks,
Ed
_________________
La respuesta está en las rocas!! Estudiadlas!!
Ed |
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Jim Prentiss
Joined: 01 Dec 2009
Posts: 103
Location: Ohio
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| Posted: Dec 05, 2009 16:05 Post subject: Re: Collection of Jim Prentiss |
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Hello Ed,
Thanks. Well I grew up in Ketchikan and I was a boy scout so I have some Epidote from POW Island and garnets from Wrangel, But do not get too excited they are deffinately not much to look at. I have to work on at least printable photos of them.
Jimp
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Tobi
Site Admin
Joined: 07 Apr 2009
Posts: 4108
Location: Germany
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| Posted: Dec 06, 2009 02:29 Post subject: Re: Collection of Jim Prentiss |
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Hi Jimp,
congratulations to that large hanksite crystal. A very impressive specimen.
Cheers
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Jim Prentiss
Joined: 01 Dec 2009
Posts: 103
Location: Ohio
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| Posted: Dec 06, 2009 18:41 Post subject: Re: Collection of Jim Prentiss |
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Thank you Tobias,
Okay here come a few more specimens. Ed, I have included a couple of the Epidote and Almandine but I forgot the pictures load up oposite of how I input them so they are last on this post
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| Here is an example of fibrous Chrysotile from the Jeffery Mine, Asbestos, Quebec, Canada. Here the attraction, in addition to being something new and different to my collection, is the color banding and the fibrous habit. The seam is 3/8" wide (0.8cm) |
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39399 Time(s) |
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| This little Orpiment piece is from Elbrusskiy Mine, Elbruss Mt, Northern Caucasus Region, Russia. I have had little luck in capturing the beauty of this brighty colored specimen. If anyone has seen this stuff before you know what I mean. The dimensions are 1" x 1/2" x 3/8" (2.5cm x 1.3cm x 0.8cm) |
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39357 Time(s) |
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| A closer shot of the upcoming Fluorite. I forgot the sequencing again. |
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39357 Time(s) |
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| My first Fluorite. This octahedral Fluorite comes from Zarembo Island, which is near Wrangel, in Southeast Alaska. I had to go there one day, in 1980, to fix a broken helicopter and our customer, a geologist, gave me this piece. The crystals are very pale light green, practically colorless on drusy Quartz, and average 1/4" (6mm) the specimen is about 4" x 2 1/2" x 1 1/4" (10.1cm x 6.4cm x 3.2cm) |
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39322 Time(s) |
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| Here is a recent acquisition. Dendritic Native Copper inclusions in Gypsum from the Mission Pit Mine, Pima County, Arizona. The photo turned out fairly well considering it was originally a photo of the host crystal which I have separately cataloged as a gypsum specimen as well. The field of veiw is about 3/4" (1.9cm) |
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39356 Time(s) |
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| My first Malachite. I have to agree with Jordi on the sacredness of leaving a mineral in its natural form. This is not what I had ordered, the dealer was helping. Still it has the habit I am most enamored with, and kids think its pretty. It is 5" x 3 1/2 x 2" (12.7cm x 8.9cm x 5.1cm) |
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39356 Time(s) |
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| Well Ed, here is a matrix specimen of the Wrangel garnets. Forgive the photography I was unable to get a decent shot at this time. This specimen is 2 1/2" square and 1 1/2" thick (6.3cm x 3.8cm) |
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39339 Time(s) |
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| This is a Wrangel Almandine I got while on a Boy Scout "Camporee" in Wrangel in 1971, Along with the matrix specimen above. Wrangel was only 80 miles away but the only way to get there was ferry or plane and after over 25 years living in Ketchikan I only got there three times. It is 5/8" (1.6cm) in diameter. |
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39359 Time(s) |
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| This POW Epidote was given to me a few yars ago by an old family friend. The crystals are quite small averaging 5/16" (8mm) long, embedded in Quartz crystal. The Epidote crystals are doubly terminated, but very dificult to get the detail here. That is one of the endearing aspects of this little guy. The field of veiw vertically is about 1 1/2" (3.8cm) |
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39307 Time(s) |
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| This Epidote I picked up as a teenager out hunting one day, on Green Monster Mountain, Prince of Wales Island, Alaska. Around 1972-73. It is an old joke between my buddy and I that he got a three point buck that day and I got a rock! It is 3 1/4" x 1 1/2" x 3/4" (8.3cm x 3.8cm x 1.9cm). It is a partial crystal and ypu can get a sense of how large it would have been. |
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39321 Time(s) |
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Jim Prentiss
Joined: 01 Dec 2009
Posts: 103
Location: Ohio
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| Posted: Dec 14, 2009 15:22 Post subject: Re: Collection of Jim Prentiss |
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Hello Everyone,
I suppose the pizza box lid support is evidence of a "budget " collection, when used as a display stand. Would I lose any points for that?
I have a couple more to add. I am traveling for work this week and I have not had too many chances to access the internet as some of the motels do not have the best service.
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| Forgive my inability to successfully capture the true luster and color of metallic minerals. This mineral is aptly named Cylindrite and is from the type locality at Santa Cruz Mine, Oruro Deparment, Bolivia. Like most of my type locality minerals, it is not museum quality, but the rare habit makes up for it. The field of view is about 1" (2.54cm) |
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39161 Time(s) |
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| These small tetrahedral crystals of Helvite are on Albite matrix. They are from the Navegador Mine, Minas Gerais, Brazil. The crystals average about 1/4" (6mm). |
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39153 Time(s) |
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| this slender prismatic doubly terminated little crystal is Childrenite on Microcline from Lavra do Poco Dantas, Minas Gerais, Brazil. It is 1" x 1/8" (25.4mm x 3.2mm). I have read that Childrenite makes a good "new species" mineral as it is only known in crystals |
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39178 Time(s) |
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Jim Prentiss
Joined: 01 Dec 2009
Posts: 103
Location: Ohio
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| Posted: Dec 15, 2009 19:54 Post subject: Re: Collection of Jim Prentiss |
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Here a few more pieces.
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| This is "starburst" Pyrophyllite from Indian Gulch, Mariposa County, Calfornia. The field of view is about 1 1/2" (3.8cm) |
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39059 Time(s) |
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| This piece is rather difficult for me to capture given the simple photographic equipment I have. I like the exremely fine fibrous habit of this Xonotlite. The specimen is 5/8" (1.6cm) accross |
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39061 Time(s) |
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| Here is a nice little twin of Loparite-(Ce) in matrix from Kukisvumchorr Mountain, Kola Peninsula, Russia. This is one of the pieces that got the attention of the US Customs as I drove accross the border a couple of years back. It is about 5/16" cubed (8mm) |
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39088 Time(s) |
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| I really like this combination of the clear Hemimorphite and bright yellow Mimetite from the Ojuela Mine, Durango, Mexico. The specimen is 3 1/2" x 2 3/4" x 2" (8.9cm x 7.0cm x 5.1cm) |
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39055 Time(s) |
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| Here is my example of Sweetwater Mine, Missouri Calcite. The main crystal is 1 1/8" x 5/8" (2.8cm x 1.6cm) |
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39052 Time(s) |
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| Description: |
| This Bismuth is from Wolfram Camp, Dimbulah, Queensland, Australia. The field of view is 1" (2.54cm). |
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39059 Time(s) |
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Jim Prentiss
Joined: 01 Dec 2009
Posts: 103
Location: Ohio
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| Posted: Jan 01, 2010 12:34 Post subject: Re: Collection of Jim Prentiss |
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Happy New Year Everyone.
I am adding some other minerals today. Again nothing that would make the pages of a mineral magazine.
| Description: |
| Trilithionite/Lepidolite; your choice, I prefer Lepidolite but the "times they are a chanin' ", and so are the mineral names.This piece is rather large at over 9" x 4 1/2 " x 2 3/4" (23cm x 11.4cm x 6.9cm). It is, as expected, from Minas Gerais, Brazil. |
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38813 Time(s) |
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| As a type locality mineral, this Sulphohalite crystal is rather nice looking. This, too, is a new mineral to my collection and it is from Searles Lake, San Bernardino County, California. The crystal is 3/4" (1.9cm). |
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38798 Time(s) |
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| Here is one of my recent acquisitions. This deep purple Stichtite in matrix is another one of my ugly type locality minerals from Stichtite Hill, Dundas Mineral Field, Zeehan District, Tasmania, Australia. The specimen is 1 1/4" x 3/4" (3.2cm x 1.9cm) |
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38808 Time(s) |
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| Here is a different Heulandite from Pato Branco, Parana, Brazil. The specimen is 1" square (2.4cm) |
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38834 Time(s) |
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| Another of my favorites. This Millerite always amazes people, especially those who know I have cats. It takes a couple of minutes with a 10x before they see the crystals for what they are. Teh field of view is 1 1/2" (3.8cm). It is from Keokuk County, Iowa. |
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38793 Time(s) |
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| Well her is "another" photo of Wavellite, but I had to include this one. This is one of my personal favorites. I like the habit and the color. I read once where most collectors would rather thier specimens be perfect and unbroken but an exception is made for Wavellite. This piece is of course from Garland County, Arkansas. the field of view is 3" (7.6cm) |
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38816 Time(s) |
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| Here is a busy piece in this Pyrite crystal "Sunflower" from the Zhuang Autonomous Region, China. It is 3 1/4" in diameter (8,3cm). It could be used as a paper weight but I'd rather not. |
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38788 Time(s) |
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| Description: |
| This Magnesioriebeckite is one of my better type locality minerals from Alto Chapare District, Chapare Province, Cochabamba Deparment, Bolivia. the field of view is 1 1/2" wide (3.8cm) |
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38765 Time(s) |
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Jim Prentiss
Joined: 01 Dec 2009
Posts: 103
Location: Ohio
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| Posted: Jan 14, 2010 11:07 Post subject: Re: Collection of Jim Prentiss |
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Hello Everyone,
I am adding a few more specimen photos to this post.
| Description: |
| Here is one of my black minerals. I like this Manganite because of the woven-like pattern of the lustrious crystals in the aggregate. it is from the Caland pit, Atikokan, Hutchingston Township, Rainy River District, Ontario, Canada. The specimen measures 3 3/4" x 2 1/4" (9.53cm x 5.72cm). |
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38657 Time(s) |
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| Description: |
| I like this Astrophyllite because of its different habit, it looks like copper colored streamers lying on the matrix. The field of view is 3" (7.62cm). It is from Eveslogchorr Mountain, Khibiny Massif, Kola Peninsula, Murmanskaja Oblast, Northern Region, Russia. |
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38643 Time(s) |
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| Description: |
| This pseudocubic crystal cluster of Apophyllite-K(OH), (Bah Humbug! I prefer Hydroyapophyllite) is 1 3/8" x 3/4" (3.49cm x 1.90cm) . it is from N’Chwaning Mine II, N’Chwaning Mines, Kalahari Manganese Fields, Northern Cape Province, South Africa |
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38685 Time(s) |
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| Description: |
| This Chrysocolla is yet another example of one of my favorite habits. Also, the blue color is, to me, quite attractive, despite the ugly matrix. It is 2 1/4" x 2" (5.72cm x 5.08cm) and is from the Kolwezi Mine, Kolwwezi, Western Area, Shaba Copper Belt, Shaba (Katnga), Democratic Republic of Congo (Zaire). |
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38658 Time(s) |
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| Description: |
| Tyuyamunite is one of the radioactive minerals in my collection that the Border Patrols sensors detected when I came down from Alaska a couple of years ago. Very sensitive equipment. I like it for its bright yellow color. The minute tabular crystals and only be appreciated with 20x or more. It is from Blue Peak Mine, Poison Canyon Area, Grants District, Cibola County, New Mexico and measures 7/8" x 3/4" (2.22cm x 1.90cm) |
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39165 Time(s) |
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| Description: |
| This specimen is a pretty good looking mineral for one of my type locality pieces. The habit and color are typical of the Aghbar Mine, Aghbar, Bou Azzer District, Tazenakht, Qiarzazate Province, Suoss-Massa-Draa Region, Morocco. It is named after Wendell E. Wilson, Editor and Publisher of the Mineralogical Record. The specimen measures 1 1/4" x 1" (3.18cm x 2.54cm). |
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38692 Time(s) |
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| Description: |
| I am sure nearly everyone has Sulphur (I prefer the old spelling) as an example of a Native Element mineral. This one is a little diffrent in that it appears to have been dripped on the matrix like wax from a tipping candle. It is from San Carlos Mine, San Felipe, Mun. de Mexicali, Baja California Norte, Mexico. The crystal is 3/8" (10mm) across |
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38676 Time(s) |
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| Description: |
| This humble Realgar specimen has a couple of well formed brightly colored crystals scattered about which are better viewed with at least a 10x. The crystals average about 1/16" (1.6mm) from Royal Reward Mine, Green River Gorge, Franklin, King County, Washington. |
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38616 Time(s) |
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| Description: |
| This little Sturmanite cluster is from N’Chwanning I Mine, N’Chwanning Mines, Kalahari Manganese Fields, Northern Cape Province, South Africa. The specimen measures 1 1/2" x 5/8" 9 3.81cm x 1.59cm) |
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38584 Time(s) |
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| Description: |
| Here is another of my type locality minerals. This was my first Variscite. The small, 1/32" (0.8mm) green spheres are from Meßbach Quarry, Altmannsgrun, Plauen, Voughtland, Saxony, Germany. |
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38574 Time(s) |
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Jim Prentiss
Joined: 01 Dec 2009
Posts: 103
Location: Ohio
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| Posted: Mar 19, 2010 20:16 Post subject: Re: Collection of Jim Prentiss |
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Hello Everyone,
It has been awhile, I have been off the net. Here are a few more humble pieces to add to the site.
| Description: |
| Clinochlore (var. Chromian Clinochlore). I tossed this one in for color. These bright lilac, tiny hexagonal crystal clusters come from the Woods Chromite Mine, Lancaster, Pennsylvania. The specimen is about 2" (5.08cm) across. |
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37864 Time(s) |
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| Description: |
| This Bournonite, from the Quiruvilca District, La Libertad Department, Peru, shows the classic "cogs wheel" Habit. The crystals average about 1/4" (6mm) in diameter. |
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37844 Time(s) |
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| Description: |
| Although it is rather lack-luster, I do not consider this type locality piece, all that ugly. I enjoy the curtain-like habit. It reminds me of the curtain-like cave formations. It comes from Mount Yukspor, Kola Peninsula, Russia. The field of view is about 1 1/4" (3.18cm) wide. |
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37863 Time(s) |
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| Description: |
| I have seen quite a bit of the "star" Muscovite coming out of Brazil. And as I have no examples, I submit this little pseudohexagonal crystal aggregate for consideration. The specimen is about 1 1/2" x 1 1/2" (3.81cm x 3.81cm) |
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37871 Time(s) |
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| Description: |
| Back to the "ugly" type locality mineral, theme. Here is a specimen of Native Iron (the small bright areas), from Disko Island, Greenland. The bright Iron spots are about 1/32" (0.8mm) in diameter. |
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37862 Time(s) |
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| Description: |
| These, seemingly formless, Calcite crystals, that have obvious rhombohedral terminations, caught my eye some years ago, in a little out of the way rock shop in Anchorage. They are from Irai, Rio Grande do Sul, Brazil and average about 1 1/4" x 3/8" (3.18cm x 0.95cm) |
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37875 Time(s) |
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Andreas Gerstenberg
Joined: 04 Mar 2010
Posts: 336
Location: Chemnitz
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| Posted: Mar 24, 2010 05:34 Post subject: Re: Collection of Jim Prentiss |
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Hi,
Nice type-locs! Some addition to your variscite. The village is spelled "Meßbach" (Messbach) not Mebbach. However, nice pics of not that often shown specimens. Hope there are still more to come;-)
Cheers
Andreas
________________________
Replaced Mebbach by Meßbach.
Carles Millan
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Jim Prentiss
Joined: 01 Dec 2009
Posts: 103
Location: Ohio
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| Posted: Jul 09, 2010 20:06 Post subject: Re: Collection of Jim Prentiss |
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Hello everyone,
I has been a while since I added photos to this forum.
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| This little Arsenopyrite is about 5/8" x 1/2" (1.59 cm x 1.27 cm). This specimen is from Chihuahua, Mexico |
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| Viewed: |
36641 Time(s) |
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| This is Tremolite var. Hexagonite, and according to one reference it comes from the Type Locality (For Hexagonite) in Edwards, Balmat-Edwards Zinc District, Saint Lawrence County, New York. It is 3 1/2" x 2 /1/2" (8.89 cm x 6.35 cm) |
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36591 Time(s) |
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| Here again I am attempting a metallic mineral. This octahedral Galena is from Huanzala Mine, Huallanca District, Dos de Mayo Province, Huanuco Departemnt, Peru. I t is 3 1/4" x 1 3/4" (8.26 cm x 4.45 cm) |
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| Viewed: |
36589 Time(s) |
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| Description: |
| Newberyite, a real Type Locality peice from Skipton Caves, Mount Widderin (Anderson’s Hill), Skipton, Corangamite Shire, Victoria, Australia. It is about 1" in diammter (2.54 cm) |
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36593 Time(s) |
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| This is a recent acquisition, Pyrite on Calcite from Chenzhou Prefecture, Hunan Province, South Central Region, China. However it reminds me of Stone Mountain, Georgia. Field of view is 1/2" (1.27 cm) |
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| Viewed: |
36606 Time(s) |
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