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am mizunaka
Joined: 09 Apr 2010
Posts: 2204
Location: USA
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 Posted: Dec 18, 2010 06:40 Post subject: Re: A mineralogical trip through the states of USA - Colorado |
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Another one for Colorado.
| Description: |
Baryte on Calcite
Stoneham, Weld Co., Colorado
Specimen size 9.6 x 4.9 cm. |
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57446 Time(s) |
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GneissWare
Joined: 07 Mar 2008
Posts: 1287
Location: California
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| Posted: Dec 18, 2010 11:03 Post subject: Re: A mineralogical trip through the states of USA - Colorado |
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Here are a few more pieces from Colorado.
| Description: |
Almandine with Magnetite on Chlorite Schist
Sedalia Mine
Sedalia District
Chaffee County, Colorado
United States of America
23.0 x 12.0 cm overall
12.0 cm Garnet
This specimen is circa 1910. |
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57491 Time(s) |
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Chalcopyrite with Sphalerite
Commodore Mine
Creede District
Creede
Mineral County, Colorado
United States of America
4.5 x 7.0 cm overall
2.5 cm Chalcopyrite
These were produced about 5 or 6 years ago. |
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57472 Time(s) |
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Joaquin Montoro
Joined: 25 Nov 2010
Posts: 225
Location: Murcia (Spain)
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| Posted: Dec 22, 2010 15:13 Post subject: Re: A mineralogical trip through the states of USA - Colorado |
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A new silver ore...
| Description: |
| Bromian Chlorargyrite.- Bull Domingo Mine, Silver Cliff, Custer Co. Colorado (USA) 6x6x3 cm. |
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57406 Time(s) |
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Damnati ad Metalla |
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vic rzonca
Joined: 18 Nov 2008
Posts: 820
Location: MA
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| Posted: Dec 23, 2010 12:03 Post subject: Re: A mineralogical trip through the states of USA - Colorado |
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| Image 3975 - Joaquin, this might be one of those times the chemical formula could be instructive.
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Joaquin Montoro
Joined: 25 Nov 2010
Posts: 225
Location: Murcia (Spain)
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| Posted: Dec 23, 2010 15:17 Post subject: Re: A mineralogical trip through the states of USA - Colorado |
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Yes, probably you're right. In some specimens I've submit time ago I've written the chemical formula too. In this case it would be Ag(Cl,Br)
Regards
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James Catmur
Site Admin
Joined: 14 Sep 2006
Posts: 1470
Location: Cambridge
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| Posted: Dec 23, 2010 16:22 Post subject: Re: A mineralogical trip through the states of USA - Colorado |
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In Bocamina there is a good photo of a Gold from Breckenridge that is in the Folch Collection (which is clearly not in California, as stated in the magazine), if you have a copy of that number.
James
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am mizunaka
Joined: 09 Apr 2010
Posts: 2204
Location: USA
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| Posted: Mar 22, 2011 04:25 Post subject: Re: A mineralogical trip through the states of USA - Colorado |
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One more for Colorado.
| Description: |
Smoky quartz and amazonite
Smoky Hawk Mine, Jewel Pocket,
Teller Co., Colorado
Specimen size 3.8 x 4 cm. |
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29342 Time(s) |
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Joaquin Montoro
Joined: 25 Nov 2010
Posts: 225
Location: Murcia (Spain)
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| Posted: Mar 22, 2011 09:05 Post subject: Re: A mineralogical trip through the states of USA - Colorado |
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Another rich silver ore...
| Description: |
| Chlorargyrite (var. Embolite) Bassick Mine, Custer Co. Colorado (USA) 9x5x5 cm. 633 grams. |
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29329 Time(s) |
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29412 Time(s) |
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| Description: |
| Solid and dense "hornsilver" |
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29370 Time(s) |
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29410 Time(s) |
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| Description: |
| Bromian Chlorargyrite.- Bassick Mine, Custer Co. Colorado (USA) 9x5x5 cm. |
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29326 Time(s) |
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Jordi Fabre
Overall coordinator of the Forum
Joined: 07 Aug 2006
Posts: 5048
Location: Barcelona
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| Posted: May 31, 2011 16:38 Post subject: Re: A mineralogical trip through the states of USA - Colorado |
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One rarity. Not only the "WoooW" specimens have room in this section! ;-)
The Hummerite is a rare vanadate, and the Hummer Mine is the type locality for the species
| Description: |
Hummerite
Hummer Mine, Paradox Valley, Montrose County, Colorado, USA
Mined about 1959
Former Folch Collection
Specimen size: 4.6 × 4.6 × 2.2 cm.
Photo: Reference Specimens |
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29243 Time(s) |
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am mizunaka
Joined: 09 Apr 2010
Posts: 2204
Location: USA
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| Posted: Jul 23, 2013 20:25 Post subject: Re: A mineralogical trip through the states of USA - Colorado |
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...
| Description: |
Rhodochrosite, Quartz, and Fluorite
Sunnyside Mine, Eureka District, San Juan Co., Colorado, USA
3.3 x 2.5 cm |
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27303 Time(s) |
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chris
Site Admin
Joined: 12 Jul 2007
Posts: 538
Location: Grenoble
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| Posted: May 08, 2016 04:39 Post subject: Re: A mineralogical trip through the states of USA - Colorado |
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Another Rhodochrosite from a famous mine.
| Mineral: | Rhodochrosite, Tetrahedrite, Chalcopyrite, Quartz |
| Locality: | | Sweet Home Mine, Corner pocket, Watercourse raise, Mount Bross, Alma District, Park County, Colorado, USA |  |
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| Dimensions: | 13x11 cm |
| Description: |
| Larget rhodo is 1 cm on edge, largest tetra about 1.5 cm on edge and chalcopyrite cluster 1.5 cm |
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24376 Time(s) |
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chris
Site Admin
Joined: 12 Jul 2007
Posts: 538
Location: Grenoble
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| Posted: May 08, 2016 04:44 Post subject: Re: A mineralogical trip through the states of USA - Colorado |
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A large specimen of dark yellow sphalerite on galena and amethyst bed.
| Mineral: | Sphalerite, Galena, Quartz (var Amethyst) |
| Locality: | | Commodore Mine, Creede District, Mineral County, Colorado, USA | |
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| Dimensions: | 15x10 cm |
| Description: |
| Largest sphalerite cluster is about 3 cm. The largest galena is about 1 cm, while the amethyst crystal are millimetrics. |
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24318 Time(s) |
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vic rzonca
Joined: 18 Nov 2008
Posts: 820
Location: MA
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| Posted: Aug 09, 2016 08:30 Post subject: Re: A mineralogical trip through the states of USA - Colorado |
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Creede, Colorado..
| Description: |
| _Mine at Creede, Colorado. |
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23832 Time(s) |
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vic rzonca
Joined: 18 Nov 2008
Posts: 820
Location: MA
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| Posted: Aug 09, 2016 08:50 Post subject: Re: A mineralogical trip through the states of USA - Colorado |
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Colorado
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23823 Time(s) |
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James Catmur
Site Admin
Joined: 14 Sep 2006
Posts: 1470
Location: Cambridge
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| Posted: Aug 09, 2016 08:59 Post subject: Re: A mineralogical trip through the states of USA - Colorado |
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| I was last there in 1982, and got out just before the flood waters arrived
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