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Jordi Fabre
Overall coordinator of the Forum
Joined: 07 Aug 2006
Posts: 4900
Location: Barcelona
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Posted: Dec 02, 2010 10:59 Post subject: A mineralogical trip through the states of USA - Colorado |
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Colorado the "Centennial State"
Usually I tend to start the thread with some unsual specimen leaving room for other people to publish specimens, but in this case....;-)
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Rhodochrosite with Tetrahedrite and Quartz Corner Pocket, Watercourse Raise, Sweet Home Mine, Alma, Colorado, USA Mined in September 1994 Specimen size: 4 × 2.8 × 2.5 cm. Main crystal size: 1.5 × 1.5 cm. Photo: Reference Specimens |
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53324 Time(s) |
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chris
Site Admin
Joined: 12 Jul 2007
Posts: 538
Location: Grenoble
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Posted: Dec 02, 2010 11:29 Post subject: Re: A mineralogical trip through the states of USA - Colorado |
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As Jordi started with the Sweet Home Mine, I'm going to complete it with some specimens having both Rhodocrosite and sulfides and/or sulfosalts as associated minerals.
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Rhodochrosite, Galena, Chalcopyrite (with Bornite coating), Quartz Octahedron Pocket, Mini King Rise, Sweet Home Mine, Alma, Colorado, USA Specimen size: 6.5 x 6 x 3 cm. Main rhodo cluster: 2.5 cm. Main Galena crystal : 1 cm Photo: Richard Jackson |
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53252 Time(s) |
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Rhodochrosite, Tetrahedrite, Bornite, Quartz 04-11 Pocket, Tetrahedrite Vein,Sweet Home Mine, Alma, Colorado, USA Specimen size: 12 x 8 x 5 cm. Main rhodo crystal : 1.5 cm. Main Tetra crystal : 3.5 cm. Photo: Richard Jackson |
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Rhodochrosite, Pyrite, Tetrahedrite, Chalcopyrite, Quartz Steve's Pocket, Sweet Home Mine, Alma, Colorado, USA Specimen size: - cm Rhodo crystal : 1.5 cm Pyrite "ball" : 1.5 cm Photo: Richard Jackson |
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53282 Time(s) |
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Joaquin Montoro
Joined: 25 Nov 2010
Posts: 225
Location: Murcia (Spain)
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Posted: Dec 02, 2010 13:45 Post subject: Re: A mineralogical trip through the states of USA - Colorado |
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My contribution...
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Chlorargyrite.- Princess Mine, Leadville, Lake Co. Colorado (USA) 9x5x4 cm. 572 grams. Historic piece of pure "hornsilver" from the famous mining district of Leadville. |
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53243 Time(s) |
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Joaquin Montoro
Joined: 25 Nov 2010
Posts: 225
Location: Murcia (Spain)
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Posted: Dec 02, 2010 15:07 Post subject: Re: A mineralogical trip through the states of USA - Colorado |
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Some more...
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Chlorargyrite (var. Bromian Chlorargyrite).- Humboldt-Pocahontas Mine, Silvercliff, Custer Co. Colorado (USA) 7x4x4 cm. 326 grams. |
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Chlorargyrite.- Matchless Mine, Leadville, Lake Co. Colorado (USA) 8x5x4 cm. 446 grams of solid "hornsilver". |
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Bromargyrite (green silver).- Little Galesburg Mine, Leadville, Lake Co. Colorado (USA) 7x4x2 cm. 195 grams. |
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53218 Time(s) |
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rweaver
Joined: 13 Apr 2009
Posts: 259
Location: Ridgecrest, California
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Posted: Dec 02, 2010 21:45 Post subject: Re: A mineralogical trip through the states of USA - Colorado |
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Former Collection of Geary Murdock. I call this the Buffalo.
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Gold Breckenridge, Summit Co., CO. 4.2cm x 2.5cm |
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53186 Time(s) |
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rweaver
Joined: 13 Apr 2009
Posts: 259
Location: Ridgecrest, California
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Posted: Dec 02, 2010 21:48 Post subject: Re: A mineralogical trip through the states of USA - Colorado |
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Former collection of Anne Frazier. Mined late 1800's.
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Silver Smuggler Mine, Aspen, CO. 2.8cm x 5.1cm |
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53167 Time(s) |
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rweaver
Joined: 13 Apr 2009
Posts: 259
Location: Ridgecrest, California
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Posted: Dec 02, 2010 21:54 Post subject: Re: A mineralogical trip through the states of USA - Colorado |
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Ok one more Rhodo.
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Rhodochrosite w/ Tetrahedrite Millennium Pocket Fluorite Raise Sweet Home Mine Alma, CO. 5.5cm x 3.8cm |
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53157 Time(s) |
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Joaquin Montoro
Joined: 25 Nov 2010
Posts: 225
Location: Murcia (Spain)
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Posted: Dec 03, 2010 02:28 Post subject: Re: A mineralogical trip through the states of USA - Colorado |
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Another piece...
Mineral: | Covellite |
Locality: | Summitville Mine, Summitville District, Rio Grande County, Colorado, USA | |
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Dimensions: | 4 x 7 x 10 cm |
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53162 Time(s) |
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Jesse Fisher
Joined: 18 Mar 2009
Posts: 629
Location: San Francisco
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Posted: Dec 03, 2010 10:10 Post subject: Re: A mineralogical trip through the states of USA - Colorado |
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A couple of pegmatite minerals:
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Topaz (5.5 cm tall), Spruce Grove, Tarryall Mountains, Park County, CO. |
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53099 Time(s) |
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Microcline (Amazonite) with Smoky Quartz, Lake George, Park County, CO. Microcline shows "striped" white overgrowth (likely albite) of selected faces. 4x4x3 cm overall size. |
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53091 Time(s) |
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Michael Shaw
Site Admin
Joined: 30 Apr 2008
Posts: 2075
Location: Oklahoma
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Posted: Dec 03, 2010 10:37 Post subject: Re: A mineralogical trip through the states of USA - Colorado |
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A few more from Colorado.
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Hubnerite - Gladstone, San Juan County, Colorado 6.9 cm |
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Cerussite - Black Cloud Mine, Leadville, Colorado 6.1 cm |
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Ankerite - Empire Mine, Gilman, Eagle Co., Colorado 9.6 cm |
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Goethite ps. siderite - Sentinel Rock, El Paso Co., Colorado 5.6 cm |
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Sphalerite - Black Cloud Mine, Leadville, Colorado 8.2 cm |
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Milky quartz - Ohio Mine, Ouray, Colorado 7.1 cm |
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am mizunaka
Joined: 09 Apr 2010
Posts: 2047
Location: USA
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Posted: Dec 04, 2010 07:01 Post subject: Re: A mineralogical trip through the states of USA - Colorado |
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A few from Colorado.
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Baryte Sherman Mine, Leadville District, Lake Co., Colorado Specimen size 14.4 x 5.5 cm. |
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52959 Time(s) |
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Quartz with Sphalerite and Minor Epidote Idarado Mine, Telluride, Ouray District, San Miguel Co., Colorado Specimen size 7 x 6.5 cm. |
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Rhodochrosite Cash Flow Pocket, Sweet Home Mine, Alma District, Park Co., Colorado Specimen size 6 x 4.7 cm. |
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Rhodochrosite with Fluorite Murphy's Pocket, Sweet Home Mine, Alma District, Park Co., Colorado Specimen size 5 x 6.5 cm. |
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Joaquin Montoro
Joined: 25 Nov 2010
Posts: 225
Location: Murcia (Spain)
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Posted: Dec 04, 2010 08:16 Post subject: Re: A mineralogical trip through the states of USA - Colorado |
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A pair of ugly but interesting and rich ore...
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Argentiferous Galena.- Monte Carlo Mine, Creede, Colorado (USA) 9x5x4 cm. |
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52939 Time(s) |
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Chlorargyrite (var. Embolite) Little Galesburg Mine, Leadville, Lake Co. Colorado (USA) 7x5x3 cm. |
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52891 Time(s) |
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Jim Prentiss
Joined: 01 Dec 2009
Posts: 103
Location: Ohio
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Posted: Dec 04, 2010 10:27 Post subject: Re: A mineralogical trip through the states of USA - Colorado |
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Hello Everyone,
Here is my one and only Colorado entry.
jimp
Description: |
Extremely small crystal of Zunyite from the type locality, at the Zuni Mine, Anvil Mountain, Silverton, Silverton District, San Juan County, Colorado. Field of view about 3/8" (0.95cm) |
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52856 Time(s) |
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am mizunaka
Joined: 09 Apr 2010
Posts: 2047
Location: USA
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Posted: Dec 09, 2010 05:22 Post subject: Re: A mineralogical trip through the states of USA - Colorado |
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A neat little pyrite from Colorado.
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Pyrite with Fluorite Climax Mine, Climax District, Lake Co., Colorado Specimen size 2 x 1.9 x 2.3 cm. |
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52531 Time(s) |
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Joaquin Montoro
Joined: 25 Nov 2010
Posts: 225
Location: Murcia (Spain)
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Posted: Dec 09, 2010 06:03 Post subject: Re: A mineralogical trip through the states of USA - Colorado |
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One more...
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Chlorargyrite.- Humboldt Pocahontas Mine, near Silvercliff, Custer Co. Colorado (USA) 11x7x4 cm. 930 grams of pure "hornsilver". |
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am mizunaka
Joined: 09 Apr 2010
Posts: 2047
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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52296 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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52320 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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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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52223 Time(s) |
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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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