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am mizunaka
Joined: 09 Apr 2010
Posts: 1394
Location: California
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 Posted: May 18, 2019 12:07 Post subject: The Mizunaka Collection - Fluorite |
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Fluorite plate with tiny quartz and calcite crystals. Higher resolution version on mindat shows better detail https://www.mindat.org/photo-956321.html
| Mineral: | Fluorite, Quartz, Calcite |
| Locality: | | Santa Eulalia District, Municipio Aquiles Serdán, Chihuahua, Mexico |  |
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| Dimensions: | 15.2 x 8.3 cm |
| Description: |
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10008 Time(s) |
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am mizunaka
Joined: 09 Apr 2010
Posts: 1394
Location: California
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| Posted: May 20, 2019 02:56 Post subject: The Mizunaka Collection - Quartz |
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Quartz almost totally replacing elbaite. A thin veneer of elbaite only remains.
| Mineral: | Quartz, Elbaite |
| Locality: | | Urubu Mine, Monte Belo, Itinga, Jequitinhonha, Minas Gerais, Brazil | |
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| Dimensions: | 5.3 x 2.4 cm |
| Description: |
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9940 Time(s) |
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Tobi
Joined: 07 Apr 2009
Posts: 3324
Location: Good Old Germany
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| Posted: May 20, 2019 08:46 Post subject: Re: The Mizunaka Collection |
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| A very interesting Urubu specimen. I have seen a lot of them and once had one in my collection, but most of them were former elbaite crystals "filled" with quartz and just a small remaining layer of green tourmaline on the outside, most of them had no real termination and looked rather weathered. But a specimen of elbaite with terminated quartz crystals as upper half is really unusual. Great specimen!
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am mizunaka
Joined: 09 Apr 2010
Posts: 1394
Location: California
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| Posted: May 20, 2019 13:12 Post subject: Re: The Mizunaka Collection |
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| Tobi wrote: | | A very interesting Urubu specimen. I have seen a lot of them and once had one in my collection, but most of them were former elbaite crystals "filled" with quartz and just a small remaining layer of green tourmaline on the outside, most of them had no real termination and looked rather weathered. But a specimen of elbaite with terminated quartz crystals as upper half is really unusual. Great specimen! |
Thanks Tobi!
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am mizunaka
Joined: 09 Apr 2010
Posts: 1394
Location: California
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| Posted: May 21, 2019 02:49 Post subject: The Mizunaka Collection - Fluorite |
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Fluorite with calcite.
| Mineral: | Fluorite, Calcite |
| Locality: | | Santa Eulalia District, Municipio Aquiles Serdán, Chihuahua, Mexico | |
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| Dimensions: | 13.0 x 11.7 cm |
| Description: |
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9758 Time(s) |
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am mizunaka
Joined: 09 Apr 2010
Posts: 1394
Location: California
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| Posted: May 25, 2019 03:31 Post subject: The Mizunaka Collection - Quartz |
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Sceptered quartz on matrix.
| Mineral: | Quartz (variety amethyst), Quartz (variety smoky quartz) |
| Locality: | | Little Gem Mine, Boulder Batholith, Jefferson County, Montana, USA | |
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| Dimensions: | 7.9 x 6.0 cm |
| Description: |
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9585 Time(s) |
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am mizunaka
Joined: 09 Apr 2010
Posts: 1394
Location: California
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| Posted: May 26, 2019 03:39 Post subject: The Mizunaka Collection - Fluorite |
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Fluorite on quartz with most of the fluorite coated with micro-crystalline quartz.
| Mineral: | Fluorite, Quartz |
| Locality: | | Deer Trail Mine, Cottonwood Creek, Baldy Peak (Mount Baldy), Tushar Mountains, Marysvale, Marysvale District, Piute County, Utah, USA | |
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| Dimensions: | 6.9 x 5.1 cm |
| Description: |
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| Viewed: |
9444 Time(s) |
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am mizunaka
Joined: 09 Apr 2010
Posts: 1394
Location: California
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| Posted: May 28, 2019 21:15 Post subject: The Mizunaka Collection - Quartz |
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| Mineral: | Quartz, Tetrahedrite |
| Locality: | | Huayllapon Mine (Huallapon Mine), Pasto Bueno District, Pallasca Province, Ancash Department, Peru | |
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| Dimensions: | 6.0 x 2.4 cm |
| Description: |
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| Viewed: |
9139 Time(s) |
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Tobi
Joined: 07 Apr 2009
Posts: 3324
Location: Good Old Germany
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| Posted: May 29, 2019 02:59 Post subject: Re: The Mizunaka Collection |
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| Wonderful Deer Trail specimen, very beautiful!
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am mizunaka
Joined: 09 Apr 2010
Posts: 1394
Location: California
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| Posted: May 29, 2019 13:43 Post subject: Re: The Mizunaka Collection |
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| Tobi wrote: | | Wonderful Deer Trail specimen, very beautiful! |
Thanks Tobi!
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am mizunaka
Joined: 09 Apr 2010
Posts: 1394
Location: California
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| Posted: May 29, 2019 22:57 Post subject: The Mizunaka Collection - Quartz with Chlorite |
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| Mineral: | Quartz with Chlorite Inclusions |
| Locality: | | Shingle Springs, Shingle Springs District, El Dorado County, California, USA | |
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| Dimensions: | 9.6 x 9.3 cm |
| Description: |
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| Viewed: |
8958 Time(s) |
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am mizunaka
Joined: 09 Apr 2010
Posts: 1394
Location: California
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| Posted: Jun 01, 2019 16:59 Post subject: The Mizunaka Collection - Rhodochrosite |
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| Mineral: | Rhodochrosite, Fluorite, Quartz |
| Locality: | | Yaogangxian Mine, Yizhang, Chenzhou Prefecture, Hunan Province, China | |
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| Dimensions: | 5.5 x 4.4 cm |
| Description: |
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| Viewed: |
8759 Time(s) |
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am mizunaka
Joined: 09 Apr 2010
Posts: 1394
Location: California
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| Posted: Jun 03, 2019 01:18 Post subject: The Mizunaka Collection - Quartz |
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Quartz growing over fluorite. A second generation of very tiny quartz crystals selectively coat portions of the quartz.
| Mineral: | Quartz, Fluorite |
| Locality: | | Huanggang Mines, Hexigten Banner (Kèshíkèténg Qí), Ulanhad (Chifeng), Inner Mongolia Autonomous Region, China | |
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| Dimensions: | 9.1 x 8.3 cm |
| Description: |
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| Viewed: |
8606 Time(s) |
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Tobi
Joined: 07 Apr 2009
Posts: 3324
Location: Good Old Germany
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| Posted: Jun 03, 2019 05:13 Post subject: Re: The Mizunaka Collection |
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| That tetrahedrite from Huayllapon Mine looks interesting, I like the pattern and the iridescent colours. Are there many smaller tetrahedrites growing on the crystal?
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am mizunaka
Joined: 09 Apr 2010
Posts: 1394
Location: California
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| Posted: Jun 03, 2019 22:48 Post subject: Re: The Mizunaka Collection |
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| Tobi wrote: | | That tetrahedrite from Huayllapon Mine looks interesting, I like the pattern and the iridescent colours. Are there many smaller tetrahedrites growing on the crystal? |
There appears to be at least one very small tetrahedrite crystal on the face of the main crystal. There are other small crystals that look like they could be galena.
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am mizunaka
Joined: 09 Apr 2010
Posts: 1394
Location: California
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| Posted: Jun 04, 2019 16:32 Post subject: The Mizunaka Collection - Quartz with chlorite |
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| Mineral: | Quartz with Chlorite inclusion |
| Locality: | | Bear Creek, New Melones Dam area, Jamestown, Calaveras County, California, USA | |
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| Dimensions: | 8.2 x 3.5 cm |
| Description: |
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| Viewed: |
8412 Time(s) |
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am mizunaka
Joined: 09 Apr 2010
Posts: 1394
Location: California
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| Posted: Jun 06, 2019 23:52 Post subject: The Mizunaka Collection - Quartz |
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| Mineral: | Quartz (variety amethyst) |
| Locality: | | Dalnegorsk, Kavalerovo Mining District, Primorskiy Kray, Far-Eastern Region, Russia | |
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| Dimensions: | 12.7 x 14.1 cm |
| Description: |
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| Viewed: |
8203 Time(s) |
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Tobi
Joined: 07 Apr 2009
Posts: 3324
Location: Good Old Germany
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| Posted: Jun 07, 2019 11:42 Post subject: Re: The Mizunaka Collection - Quartz |
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| am mizunaka wrote: | Quartz (variety amethyst)
Dalnegorsk, Kavalerovo Mining District, Primorskiy Kray, Far-Eastern Region, Russia
Dimensions: 12.7 x 14.1 cm |
The overall form, the quality and condition, the colour, the size - I think this is the best amethyst specimen I have ever seem from Dalnegorsk!
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am mizunaka
Joined: 09 Apr 2010
Posts: 1394
Location: California
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| Posted: Jun 07, 2019 14:11 Post subject: Re: The Mizunaka Collection - Quartz |
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| Tobi wrote: | | am mizunaka wrote: | Quartz (variety amethyst)
Dalnegorsk, Kavalerovo Mining District, Primorskiy Kray, Far-Eastern Region, Russia
Dimensions: 12.7 x 14.1 cm |
The overall form, the quality and condition, the colour, the size - I think this is the best amethyst specimen I have ever seem from Dalnegorsk! |
Thanks Tobi! This came out of an old collection and there was one other smaller piece that was nice but did not have the color that this one has.
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am mizunaka
Joined: 09 Apr 2010
Posts: 1394
Location: California
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| Posted: Jun 08, 2019 11:27 Post subject: The Mizunaka Collection - Quartz |
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Quartz included with kaolinite. Appears to be exhibiting some form of growth interference.
| Mineral: | Quartz |
| Locality: | | Atlanta suburbia area, Gwinnett County, Georgia, USA | |
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| Dimensions: | 12.4 x 6.6 cm |
| Description: |
| Barrett Mine, Gwinnett Co., Georgia, USA |
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| Viewed: |
8036 Time(s) |
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