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John S. White
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Joined: 04 Sep 2006
Posts: 1298
Location: Stewartstown, Pennsylvania, USA
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 Posted: May 13, 2010 10:31 Post subject: Re: Calcite Forms - (4) |
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Wonderful poker chip calcites have been coming out of China over the last several years, many of which appear twinned and show beautiful zoning from colorless transparent to white or gray. I believe Jordi has at least one very good image.
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John S. White
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Jordi Fabre
Overall coordinator of the Forum
Joined: 07 Aug 2006
Posts: 5049
Location: Barcelona
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| Posted: May 13, 2010 11:22 Post subject: Re: Calcite Forms - (4) |
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Maybe this one?
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Twinned Calcite
Wuzhou Mine, Guangxi, China |
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29811 Time(s) |
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John S. White
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Joined: 04 Sep 2006
Posts: 1298
Location: Stewartstown, Pennsylvania, USA
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| Posted: May 13, 2010 18:58 Post subject: Re: Calcite Forms - (4) |
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Jordi:
That was not exactly what I had in mind. I will try to get a photo of one that I have.
Thanks for posting this one.
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John S. White
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Jim Prentiss
Joined: 01 Dec 2009
Posts: 103
Location: Ohio
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| Posted: May 13, 2010 21:20 Post subject: Re: Calcite Forms - (4) |
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Hello all,
These are all nice pieces. Like I said earlier, I like this kind of post as it creates a place for numerous examples of a particular species to be shown. Like a publication on one mineral.
Jim Prentiss
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ruggyh
Joined: 10 May 2010
Posts: 6
Location: Morgan Hill, California
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| Posted: May 13, 2010 22:52 Post subject: Re: Calcite Forms - (4) |
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Calcite scalenohedron (dog tooth) on Stibnite with Fluorite
Xikaungshan deposit, Hunan Province, China
Calcite crystal 30mm x 14mm
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29725 Time(s) |
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John S. White
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Joined: 04 Sep 2006
Posts: 1298
Location: Stewartstown, Pennsylvania, USA
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| Posted: May 14, 2010 08:13 Post subject: Re: Calcite Forms - (4) |
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These photos of the same piece probably show the poker chip habit better. This is from the Fozichong lead & zinc mine, Guangxi Province, China, and is 11 cm across.
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49710 Time(s) |
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49676 Time(s) |
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John S. White
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Jordi Fabre
Overall coordinator of the Forum
Joined: 07 Aug 2006
Posts: 5049
Location: Barcelona
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| Posted: May 28, 2010 04:45 Post subject: Re: Calcite Forms - (4) |
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A funny one
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The white crystals are not what they look like: they are Calcite, so don’t be mistaken! ;-) The brown ones are what they look like: Dolomite...
Roata mine, Cavnic, Maramures, Rumania
Mined in 2004
Specimen size: 3.5 × 3.4 × 2.9 cm.
Calcite fluorescent long & short UV
Photo from "Reference Specimens" |
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49651 Time(s) |
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Jordi Fabre
Overall coordinator of the Forum
Joined: 07 Aug 2006
Posts: 5049
Location: Barcelona
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| Posted: Jun 09, 2010 08:59 Post subject: Re: Calcite Forms - (4) |
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An oddity
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Calcite with sand inclusions
A French “super-classic”. Group of acute rhombohedral crystals of calcite that have grown including white sand.
Bellecroix (Forêt), Fontainebleau, Seine-et-Marne, Ile-de-France, France
Former Palix collection. Mined in the XIX Century
Specimen size: 4.7 × 3.3 × 3 cm.
Main crystal size: 1.7 × 1.5 cm.
Photo from "Reference Specimens" |
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49588 Time(s) |
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49540 Time(s) |
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Tobi
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Joined: 07 Apr 2009
Posts: 4248
Location: Germany
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| Posted: Jun 09, 2010 09:47 Post subject: Re: Calcite Forms - (4) |
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When talking of oddities, here once again pictures of the calcite from Holzen quarry, North Rhine-Westphalia, Germany. See the last pages of my collection thread for further pictures and information about this specimen.
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| The odd calcite twin. Size 25 mm. |
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49513 Time(s) |
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| Here a "normal" crystal from Holzen, grown on dolomite. Crystal size 15 mm. |
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49505 Time(s) |
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am mizunaka
Joined: 09 Apr 2010
Posts: 2204
Location: USA
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| Posted: Jun 15, 2010 02:58 Post subject: Re: Calcite Forms - (4) |
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Another calcite from the Roncari Quarry.
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| A plate of doubly terminated calcites to 4 cm in length. Overall size 8.2 x 6.2 cm |
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49404 Time(s) |
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Jordi Fabre
Overall coordinator of the Forum
Joined: 07 Aug 2006
Posts: 5049
Location: Barcelona
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| Posted: Jun 15, 2010 10:47 Post subject: Re: Calcite Forms - (4) |
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A beauty, isn't?
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Cobaltian Calcite
Bou Azzer area, Tazenakht, Ouarzazate, Morocco.
Mined in January 2006
Specimen size: 5.8 × 5 × 2.5 cm.
Main crystal size: 0.8 × 0.7 cm.
Fluorescence short UV & low fluorescence long UV
Photo from "Reference Specimens" |
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49367 Time(s) |
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| The crystals shows well defined rhombohedron terminal faces |
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49328 Time(s) |
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Audaces fortuna iuvat |
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Tobi
Site Admin
Joined: 07 Apr 2009
Posts: 4248
Location: Germany
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| Posted: Jun 15, 2010 12:55 Post subject: Re: Calcite Forms - (4) |
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| Jordi Fabre wrote: | | A beauty, isn't? |
Jordi, it definitely IS! :-)
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Paul Bordovsky
Joined: 07 Nov 2008
Posts: 46
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| Posted: Jun 20, 2010 12:31 Post subject: Re: Calcite Forms - (4) |
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I finally got around to shooting some new pics, and here are some calcites to add to this thread.
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| Calcite discs on quartz ps. after calcite. Droujba mine, Bulgaria. 28cm. x 16cm. |
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49181 Time(s) |
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49207 Time(s) |
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49261 Time(s) |
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49217 Time(s) |
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| Pagoda style calcite from Leiping mine, Chenzhou, China. The chinese dealer called it "mushroom" calcite. 16.3 x 9.5 cm. |
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49215 Time(s) |
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49235 Time(s) |
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| Calcite from Terlingua, Texas, USA. From the Lone Star Mine. 32 x 21.5 cm. Although it does have a creamy white fluorescence, it does not have the famous blue fluorescence and phosphorescence under SW UV, like its more well known "Terlingua" brothers, which only came from one mine. |
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49172 Time(s) |
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| These crystals are clear with yellow phantoms. |
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49152 Time(s) |
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Paul Bordovsky
Joined: 07 Nov 2008
Posts: 46
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| Posted: Jun 20, 2010 12:47 Post subject: Re: Calcite Forms - (4) |
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I thought I'd add a few calcites local to the central Texas area, around Austin.. All are from Travis county, Texas, USA.
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| "Gum drop" calcite, named by the collector. 19 x 21 cm. |
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49187 Time(s) |
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49169 Time(s) |
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| "Dogtooth" calcite found near the previous gumdrop specimen. 10 x 8 cm. |
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49137 Time(s) |
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49151 Time(s) |
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| Large calcite found during road construction of the Mopac expressway. The collector acid dipped this to clean it up. 14.5 cm. |
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49126 Time(s) |
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49131 Time(s) |
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Tracy
Joined: 15 Sep 2006
Posts: 551
Location: Toronto
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| Posted: Jun 20, 2010 19:27 Post subject: Re: Calcite Forms - (4) |
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Finally I had a bit of free time and can contribute one of my own specimens! The lighting isn't ideal and doesn't show that the entire piece is white. I'm not sure exactly form these crystals have (there appear to be 5 sides to each crystal) but because the main crystals are very elongated they impart a "flower-like" the appearance to the specimen. From Daye Copper Mine, Daye Co., Huangshi Prefecture, Hubei Province, China. Size is about 13.5 x 7.5 x 4 cm.
- Tracy
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49101 Time(s) |
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49060 Time(s) |
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49125 Time(s) |
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