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Collection of Michael Shaw
  Goto page Previous  1, 2, 3 ... 56, 57, 58, 59  Next
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crosstimber
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PostPosted: Sep 02, 2017 09:50    Post subject: Re: Collection of Michael Shaw  

...


Fluorite - Okarusu Mine, Namibia.jpg
 Mineral: Fluorite
 Locality:
Okorusu Mine, Otjiwarongo District, Otjozondjupa Region, Namibia
 Dimensions: 5.6 x 7.6 cm
 Description:
Intergrown groups of cubic green fluorite crystals to 1.5 cm. with purple cores.
 Viewed:  1686 Time(s)

Fluorite - Okarusu Mine, Namibia.jpg


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crosstimber
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PostPosted: Sep 04, 2017 13:27    Post subject: Re: Collection of Michael Shaw  

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Chalcopyrite dolomite - Picher Field, Oklahoma.jpg
 Mineral: Chalcopyrite on dolomite
 Locality:
Picher Field, Tri-State District, Ottawa County, Oklahoma, USA
 Dimensions: 3.5 x 6.1 cm
 Description:
Sharp sphenoidal crystals of iridescent chalcopyrite and curved crystals of pink dolomite on a small bit of chert matrix.
 Viewed:  1579 Time(s)

Chalcopyrite dolomite - Picher Field, Oklahoma.jpg


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crosstimber
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PostPosted: Sep 05, 2017 13:32    Post subject: Re: Collection of Michael Shaw  

...


Mottramite - Ojuela Mine, Level 35, Mapimi, Durango, Mexico.jpg
 Mineral: Mottramite
 Locality:
Ojuela Mine, level 35, Mapimí, Municipio Mapimí, Durango, Mexico
 Dimensions: 4.4 x 6.0 cm
 Description:
Velvety-textured olive green mottramite forming cauliflower-like aggregates.
 Viewed:  1486 Time(s)

Mottramite - Ojuela Mine, Level 35, Mapimi, Durango, Mexico.jpg


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crosstimber
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PostPosted: Sep 06, 2017 12:45    Post subject: Re: Collection of Michael Shaw  

...


Prehnite ps. anhydrite - Lane Quarry, Westfield, Massachusetts.jpg
 Mineral: Prehnite pseudomorph after Anhydrite
 Locality:
Lane Quarry, Westfield, Hampden County, Massachusetts, USA
 Dimensions: 3.3 x 5.1 cm
 Description:
A stout stalactite of mint green prehnite pseudomorphing anhydrite. A rectangular hole is visible on the bottom of the specimen which once contained the anhydrite.
 Viewed:  1428 Time(s)

Prehnite ps. anhydrite - Lane Quarry, Westfield, Massachusetts.jpg


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vic rzonca




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PostPosted: Sep 06, 2017 14:33    Post subject: Re: Collection of Michael Shaw  

That prehnite is a beauty Mike, and a really nice image. So little comes out of that location. That may have been found in the past couple years, I managed to collect a few almost identical to yours. Nice to see a fine specimen, from my backyard, presented the way you have done so. Thanks.
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crosstimber
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PostPosted: Sep 06, 2017 14:53    Post subject: Re: Collection of Michael Shaw  

vic rzonca wrote:
That prehnite is a beauty Mike, and a really nice image. So little comes out of that location. That may have been found in the past couple years, I managed to collect a few almost identical to yours. Nice to see a fine specimen, from my backyard, presented the way you have done so. Thanks.


Thanks Vic. Having grown up in Massachusetts, I collected at many localities throughout the state, but I never managed to get in to the Lane Quarry while we lived there.
Michael
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Jamison Brizendine




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PostPosted: Sep 06, 2017 15:12    Post subject: Re: Collection of Michael Shaw  

Speaking of the Lane Quarry, I found a reference to it in a Rock and Gem article by Bob Jones.

"The best-known Massachusetts quarry is the Lane Quarry in Westfield. Decades ago, it was accessible and produced wonderful datolites reaching three inches in diameter, some of the largest ever found in this country. The Lane Quarry is also well known for babingtonite, a black mineral that frequently occurs as microscopic to 1-inch crystals in some basalt quarries. It has lately been found in India associated with zeolites.

Unfortunately, Westfield has been off limits for decades. Controls there have been so tight that even when I asked the President of Lane Construction Company over for dinner one night, I was refused admission! (Jones, 2003, p. 76)"

Well got to give credit to Bob for trying, but it makes for a good story. I agree with Vic, this is an outstanding prehnite.

References Cited:

Jones, B., 2007, The Frugal Collector: The Zeolites, Part II: Natrolite, Mesolite, Scolecite and More, Rock and Gem, v. 37 (7), p. 72-74, 76-78.
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crosstimber
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PostPosted: Sep 06, 2017 16:09    Post subject: Re: Collection of Michael Shaw  

Jamison Brizendine wrote:
Speaking of the Lane Quarry, I found a reference to it in a Rock and Gem article by Bob Jones.

"The best-known Massachusetts quarry is the Lane Quarry in Westfield. Decades ago, it was accessible and produced wonderful datolites reaching three inches in diameter, some of the largest ever found in this country. The Lane Quarry is also well known for babingtonite, a black mineral that frequently occurs as microscopic to 1-inch crystals in some basalt quarries. It has lately been found in India associated with zeolites.

Unfortunately, Westfield has been off limits for decades. Controls there have been so tight that even when I asked the President of Lane Construction Company over for dinner one night, I was refused admission! (Jones, 2003, p. 76)"

Well got to give credit to Bob for trying, but it makes for a good story. I agree with Vic, this is an outstanding prehnite.

References Cited:

Jones, B., 2007, The Frugal Collector: The Zeolites, Part II: Natrolite, Mesolite, Scolecite and More, Rock and Gem, v. 37 (7), p. 72-74, 76-78.


Thanks Jamison. I enjoyed reading about Bob Jones' experiences attempting to gain access. Babingtonites from this locality are well-known and I am lucky to have a nice one from there. The 3 inch datolites, however, have eluded me thus far :>)
Michael
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PostPosted: Sep 20, 2017 13:47    Post subject: Re: Collection of Michael Shaw  

...


Topaz - Agnus Dei Claim, Colorado.jpg
 Mineral: Topaz
 Locality:
Agnus Dei Claim, Cameron Cone, Crystal Park, El Paso County, Colorado, USA
 Dimensions: 2.7 x 3.3 cm
 Description:
 Viewed:  1214 Time(s)

Topaz - Agnus Dei Claim, Colorado.jpg


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crosstimber
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PostPosted: Sep 21, 2017 15:27    Post subject: Re: Collection of Michael Shaw  

...


2512 Andradite-Grossular series - Huanggang Fe-Sn deposit, Inner Mongolia, China.jpg
 Mineral: Andradite-Grossular series
 Locality:
Huanggang Mines, Hexigten Banner (Kèshíkèténg Qí), Ulanhad (Chifeng), Inner Mongolia Autonomous Region, China
 Dimensions: 3.5 x 5.1 cm
 Description:
 Viewed:  1145 Time(s)

2512 Andradite-Grossular series - Huanggang Fe-Sn deposit, Inner Mongolia, China.jpg


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crosstimber
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PostPosted: Sep 23, 2017 12:23    Post subject: Re: Collection of Michael Shaw  

Did I happen to mention that galena is my favorite mineral :>)


2508 Galena - Ojuela Mine, Mapimi, Durango, Mexico.jpg
 Mineral: Galena
 Locality:
Ojuela Mine, Mapimí, Municipio Mapimí, Durango, Mexico
 Dimensions: 3.5 x 3.5 cm
 Description:
 Viewed:  1057 Time(s)

2508 Galena - Ojuela Mine, Mapimi, Durango, Mexico.jpg


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crosstimber
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PostPosted: Sep 24, 2017 17:54    Post subject: Re: Collection of Michael Shaw  

...


Scolecite 0219.jpg
 Mineral: Scolecite
 Locality:
Chandanapuri, Samgamner, Ahmadnagar District, Maharashtra, India
 Dimensions: 3.6 x 4.7 cm
 Description:
Bright orange radiating scolecite surrounded by botryoidal colorless chalcedony.
 Viewed:  986 Time(s)

Scolecite 0219.jpg


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Tobi




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PostPosted: Sep 25, 2017 11:38    Post subject: Re: Collection of Michael Shaw  

crosstimber wrote:
Did I happen to mention that galena is my favorite mineral :>)
Yes, several times, but I don't mind ;-)
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PostPosted: Sep 25, 2017 14:46    Post subject: Re: Collection of Michael Shaw  

I knew you wouldn't mind Tobi ... I'll have a few new ones to post later in the week. However, just in case some people get tired of looking at heavy gray minerals, today's offering is fluorite.


Fluorite - Musquiz, Coahuila, Mexico.jpg
 Mineral: Fluorite
 Locality:
Tule Mine, Melchor Múzquiz, Municipio Melchor Múzquiz, Coahuila (Coahuila de Zaragoza), Mexico
 Dimensions: 4.3 x 6.5 x 8.4 cm.
 Description:
Cubic fluorite with complex stepped growth and pale purple color zoning at the crystal edges.
 Viewed:  905 Time(s)

Fluorite - Musquiz, Coahuila, Mexico.jpg


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Pierre Joubert




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PostPosted: Sep 26, 2017 09:32    Post subject: Re: Collection of Michael Shaw  

Hi Michael. The chalcedony (Scolecite 0219.jpg); is it not possibly hyalite opal?
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'The tree of silence bears the fruit of peace. '
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crosstimber
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PostPosted: Sep 26, 2017 13:19    Post subject: Re: Collection of Michael Shaw  

Pierre Joubert wrote:
Hi Michael. The chalcedony (Scolecite 0219.jpg); is it not possibly hyalite opal?


Hi Pierre,

Superficially they do look a lot like hyalite, but the hardness points to chalcedony. The lack of strong green fluorescence that often accompanies hyalite is also clue. Mindat lists only scolecite, chalcedony, and stilbite from this location.

Michael
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PostPosted: Sep 26, 2017 13:30    Post subject: Re: Collection of Michael Shaw  

...


Heterosite - White Elephant Mine, Cicero Peak, Custer Co, South Dakota.jpg
 Mineral: Heterosite
 Locality:
White Elephant Mine, Cicero Peak, Pringle, Custer District, Custer County, South Dakota, USA
 Dimensions: 4.8 x 6.6 cm
 Description:
 Viewed:  753 Time(s)

Heterosite - White Elephant Mine, Cicero Peak, Custer Co, South Dakota.jpg


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PostPosted: Sep 27, 2017 16:00    Post subject: Re: Collection of Michael Shaw  

...


2501 Calcite - Joplin Field, Jasper County, Missouri.jpg
 Mineral: Calcite
 Locality:
Joplin Field, Tri-State District, Jasper County, Missouri, USA
 Dimensions: 4.2 x 5.5 x 5.6 cm
 Description:
Scalenohedral calcite crystals resting on a bit of chert matrix with pink dolomite. Many Tri-State calcites have been acid dipped to improve their luster. This one escaped that treatment and the surface features are still visible.
 Viewed:  615 Time(s)

2501 Calcite - Joplin Field, Jasper County, Missouri.jpg


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PostPosted: Sep 28, 2017 16:38    Post subject: Re: Collection of Michael Shaw  

...


2495 - Pyrite, Duff Quarry, Huntsville, Ohio.JPG
 Mineral: Pyrite
 Locality:
C. E. Duff & Son Quarry, Huntsville, Logan County, Ohio, USA
 Dimensions: 3.0 x 4.6 x 6.2 cm
 Description:
Bright pyrite crystals to 0.5 cm nestled in a shallow cavity in gray dolostone. Small remnants of white calcite, which was etched to expose the pyrite, are present. The crystals exhibit the uncommon diploid habit.
 Viewed:  534 Time(s)

2495 - Pyrite, Duff Quarry, Huntsville, Ohio.JPG



2495 Pyrite - Duff Quarry, Ohio.JPG
 Mineral: Pyrite
 Locality:
C. E. Duff & Son Quarry, Huntsville, Logan County, Ohio, USA
 Dimensions: 3.0 x 4.6 x 6.2 cm
 Description:
 Viewed:  534 Time(s)

2495 Pyrite - Duff Quarry, Ohio.JPG


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Bob Harman




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PostPosted: Sep 28, 2017 17:57    Post subject: Re: Collection of Michael Shaw  

MICHAEL, Nice example. I have several similar pyrite specimens from Duff's Quarry. I too etched some calcite from one of them.
Is there any specific reason your example still has a small remaining area of obviously acid etched calcite? Why not carefully etch it away with some vinegar?
Regards, BOB
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