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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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44981 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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44925 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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44972 Time(s) |
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Carles Millan
Site Admin
Joined: 05 May 2007
Posts: 1531
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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45006 Time(s) |
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Carles Millan
Site Admin
Joined: 05 May 2007
Posts: 1531
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: 842
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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44782 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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44729 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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44700 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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44704 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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44750 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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44771 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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44739 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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44800 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: 4235
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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44636 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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| A closer shot of the upcoming Fluorite. I forgot the sequencing again. |
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44620 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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44554 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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44582 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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44565 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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44580 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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44599 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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44544 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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44542 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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44387 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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44366 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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44377 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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44302 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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44297 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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44311 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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44280 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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44297 Time(s) |
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| This Bismuth is from Wolfram Camp, Dimbulah, Queensland, Australia. The field of view is 1" (2.54cm). |
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44292 Time(s) |
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