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Mineral Specimens with Pyrite
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When these specimens first came out, they were instantly regarded as one of the best finds of this species from the Western Hemisphere. Many people associate great Bournoite specimens with the classic pieces from Herodsfoot, Cornwall, England. This piece is very comparable to the English specimens, because it has the classic "cog-wheel" form and shows a nice 2 cm crystal on octahedral crystallized Pyrite. Please note that these specimens are very difficult to obtain on a crystallized matrix. They are typically associated with either granular Quartz or are simply single crystals off matrix. This piece has very good bang for the buck if you''re looking for a good miniature at a great price. I am told that this mine has not produced a crumb of Bournonite for almost six months now, and keeping in mind the ever uncertain and unstable political status in Bolivia combined with the long periods of mining inactivity, there is a good chance that there may not be any more of these specimens for a long time. 4.3 x 3.2 x 2.7 cm
An uncommon and beautiful Peruvian specimen - purple fluorite with a super-bright pyrite crystal, and associated sphalerite. 4.8 x 4.5 x 3.2 cm
14.3 x 7.0 x 6.5 cm. A striking, very rare cabinet quartz specimen from Mariposa County, California. This giant crystal is a complete-all-around, doubly terminated floater. The glassy crystals are transparent to translucent. Two sides of the main crystal show inclusions of sparkly, brassy, pyrite microcrystals. The sidecar crystals, the unusual, notched, stepped-growth, basal termination and water-clear, main termination are super accents. Ex. F. Stevano Collection.
8.3 x 8.0 x 6.0 cm. An amazing pyrite concretion from a new Chinese find. This striking, flattened shale ball has parallel bands of sparkly pyrite microcrystals on the sides and is solid banded pyrite on the bottom. The shale ball looks like a hand-woven basket or clay pot with a very intricate, stylized pattern on the "lid".
10.2 x 8.5 x 4.2 cm. A classic, old-time and fine cabinet specimen from the Oppu Mine of Japan. Sparkly, iridescent pyritohedrons are richly sprinkled on the starkly contrasting, bubbly, botryoidal, pastel-pink rhodochrosite-coated sculptural, tabular matrix. Rhodochrosite also coats the backside of the crust, but there are very few pyrites there. Excellent, large, combination material from this historic locality.
9.4 x 8.4 x 5.0 cm. This find was made a couple of years back in China, and is absolutely unique: glittery, golden pyrite microcrystals on the edges of huge (to 5.3 cm across on this piece) flattened rhombs of pastel-pink manganoan calcite. Some of the specimens had very sparse coverage of pyrite, just a salting, but here, it is richly carpeting the crystal edges. Excellent orange fluorescence.
5.3 x 4.3 x 4.1 cm. An unusual and fine pseudomorph from the Herja Mine of Romania. Sparkly, brass-yellow pyrite has pseudomorphed a large, tapering, hexagonal pyrrhotite crystal consisting of stacked, lamellar crystals. The base of the piece has massive galena.
7.5 x 6.0 x 3.0 cm. An aesthetic and outstanding cluster of mirror-bright, lightly striated, brass-yellow pyritohedrons from the famous Huanzala Mine of Peru and the Don Boydston Collection. The large, 2.0 cm crystal is beautifully and centrally located on this fine, mounded plate.
8.4 x 5.2 x 4.9 cm. Nests of scintillating, soft-to-the-touch, hair-like, jamesonite needles to about 1.5 cm richly cover the front of the mounded matrix of sulfides on this classic specimen from Zacatecas, Mexico. A lustrous, 6 mm, pyrite crystal on top of the matrix is a nice touch. Ex. Mullane Collection. This piece dates to the 1960s or 1970s.
5.2 x 4.5 x 2.4 cm. An exceptional and aesthetic pyrite specimen from the historic iron mines at Rio Marina, Isle of Elba. A very sharp, complete all-around and pristine, lustrous, brassy, pyrite crystal is attached to a hodge-podge pile of poker-chip-like pyrite crystals. A splendent packet of contrasting hematite blades at the base is a fine accent. The iron mines at Rio Marina date to the Etruscans. This is superb material from this classic locale. Ex. A.L. Kidwell Collection and a note on his label states that he bought the piece in 1966 from an Italian.
5.4 x 5.4 x 5.4 cm. A striking pseudomorph of blocky goethite after a very sharp octahedral pyrite crystal from Diamantina, Brazil. This complete-all-around, very mildly contacted, floater, looks like a reflected Great Pyramid at Giza, Egypt.
10.2 x 9.5 x 4.0 cm. Bravoite was the name given to an uncommon nickeloan variety of pyrite and this showy, old-time, Colorado cabinet specimen is from a very uncommon locale - the Rico Argentine Mine at Rico. A thin coating of brassy bravoite covers the lustrous, elongated, tabular, modified pyrite crystals on this very showy piece. Ex. Jaime Bird Collection, whose card indicates that he purchased the piece in 1962. For some time, these specimens were labeled as being pyrite coated by "Bravoite". This is completely incorrect, as analysis done by Dr. Pete Modreski at the USGS in Denver, showed that the thin grey coating or "film" on these pyrite crystals is actually a micro layer of molybdenite. Please refer to the post on the following link: http://www.mineral-forum.com/message-board/viewtopic.php?t=360. This specimen is a prime example of this material showing excellent form and virtually no damage.
18.7 x 10 x 3 cm. An attractive complex balls of Pyrite crystals set beautifully in and against a black shale matrix. The larger ball is about 3 cm across, and the smaller disc is 1.5 cm across. The large sphere is composed of modified cubes, and has excellent metallic luster. The smaller disc, as well as the elongated 3.5 cm disc along the side, are composed of very fine, almost drusy, Pyrite crystals that give it a wonderfully delicate sparkle. Very unusual material. Ex. Charlie Key stock.
3.0 x 2.2 x 1.6 cm. A fine, sharp, pale golden pyritohedral crystal group of Pyrite sits atop a crystallized matrix of black tetrahedral Sphalerite. The largest Pyrite crystal measures 1.2 cm across.
12.6 x 10.3 x 4.7 cm. Richard Kosnar mined the Sweet Home for a few years during the late 1970's and managed to collect some excellent Rhodochrosite specimens. This piece is from one of the last pockets that Rich opened before he was done at the mine. The Rhodochrosite crystals on this specimen have nice pink-red color with decent gemminess. The largest Rhodochrosite measures 1.1 cm across. They are sitting atop a mix of black, lustrous Tetrahedrite and Quartz crystal matrix with minor associated Pyrite. Ex. Richard Kosnar Collection.
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Rob Lavinsky, rob@irocks.com
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share specimen![Bournonite, Pyrite from Viboras Mine, Machacamarca, Machacamarca District (Colavi District), Cornelio Saavedra Province, Potosí Department, Bolivia [db_pics/mdpics/MD-23762a.jpg]](db_pics/mdpics/MD-23762a.jpg)
![Fluorite, Pyrite from Huanzala Mine, Huallanca District, Dos de Mayo Province, Huánuco Department, Peru [db_pics/mdpics/MD-23825a.jpg]](db_pics/mdpics/MD-23825a.jpg)
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![Quartz, Pyrite from Unnamed Pyrite-Quartz occurrence, Hornitos, Mariposa Co., California, USA [db_pics/mdpics/MD-238395b.jpg]](db_pics/mdpics/MD-238395b.jpg)
![Pyrite from Dongchuan District, Kunming Prefecture, Yunnan Province, China [db_pics/mdpics/MD-238827a.jpg]](db_pics/mdpics/MD-238827a.jpg)
![Pyrite from Dongchuan District, Kunming Prefecture, Yunnan Province, China [db_pics/mdpics/MD-238827b.jpg]](db_pics/mdpics/MD-238827b.jpg)
![Pyrite, Rhodochrosite from Oppu mine, Nishimeya-mura, Naka-Tsugaru-gun, Aomori Prefecture, Tohoku Region, Honshu Island, Japan [db_pics/mdpics/MD-238836a.jpg]](db_pics/mdpics/MD-238836a.jpg)
![Pyrite, Rhodochrosite from Oppu mine, Nishimeya-mura, Naka-Tsugaru-gun, Aomori Prefecture, Tohoku Region, Honshu Island, Japan [db_pics/mdpics/MD-238836b.jpg]](db_pics/mdpics/MD-238836b.jpg)
![Pyrite, Calcite (Var: Manganoan Calcite) from Chenzhong (?), Hunan Province, China [db_pics/mdpics/MD-238841a.jpg]](db_pics/mdpics/MD-238841a.jpg)
![Pyrite, Calcite (Var: Manganoan Calcite) from Chenzhong (?), Hunan Province, China [db_pics/mdpics/MD-238841b.jpg]](db_pics/mdpics/MD-238841b.jpg)
![Pyrite, Pyrrhotite, Galena from Herja Mine (Kisbánya), Baia Mare (Nagybánya), Maramures Co., Romania [db_pics/mdpics/MD-238901a.jpg]](db_pics/mdpics/MD-238901a.jpg)
![Pyrite, Pyrrhotite, Galena from Herja Mine (Kisbánya), Baia Mare (Nagybánya), Maramures Co., Romania [db_pics/mdpics/MD-238901b.jpg]](db_pics/mdpics/MD-238901b.jpg)
![Pyrite from Huanzala Mine, Huallanca District, Dos de Mayo Province, Huánuco Department, Peru [db_pics/mdpics/MD-238924a.jpg]](db_pics/mdpics/MD-238924a.jpg)
![Jamesonite, Pyrite from Zacatecas, Mun. de Zacatecas, Zacatecas, Mexico [db_pics/mdpics/MD-239900a.jpg]](db_pics/mdpics/MD-239900a.jpg)
![Jamesonite, Pyrite from Zacatecas, Mun. de Zacatecas, Zacatecas, Mexico [db_pics/mdpics/MD-239900b.jpg]](db_pics/mdpics/MD-239900b.jpg)
![Jamesonite, Pyrite from Zacatecas, Mun. de Zacatecas, Zacatecas, Mexico [db_pics/mdpics/MD-239900c.jpg]](db_pics/mdpics/MD-239900c.jpg)
![Pyrite, Hematite from Rio Marina, Elba Island, Livorno Province, Tuscany, Italy [db_pics/mdpics/MD-239922a.jpg]](db_pics/mdpics/MD-239922a.jpg)
![Goethite, Pyrite from Diamantina, Jequitinhonha valley, Minas Gerais, Southeast Region, Brazil [db_pics/mdpics/MD-239927a.jpg]](db_pics/mdpics/MD-239927a.jpg)
![Molybdenite, Pyrite from http://www.mineral-forum.com/message-board/viewtopic.php?t=360. [db_pics/mdpics/MD-240029a.jpg]](db_pics/mdpics/MD-240029a.jpg)
![Pyrite from Millstream Station, Pilbara Region, Western Australia, Australia [db_pics/mdpics/MD-240273a.jpg]](db_pics/mdpics/MD-240273a.jpg)
![Pyrite from Millstream Station, Pilbara Region, Western Australia, Australia [db_pics/mdpics/MD-240273b.jpg]](db_pics/mdpics/MD-240273b.jpg)
![Pyrite from Millstream Station, Pilbara Region, Western Australia, Australia [db_pics/mdpics/MD-240273c.jpg]](db_pics/mdpics/MD-240273c.jpg)
![Pyrite, Sphalerite from Central City District, Gilpin Co., Colorado, USA [db_pics/mdpics/MD-240645a.jpg]](db_pics/mdpics/MD-240645a.jpg)
![Rhodochrosite, Tetrahedrite, Quartz, Pyrite from Sweet Home Mine (Home Sweet Home Mine), Mount Bross, Alma District, Park Co., Colorado, USA [db_pics/mdpics/MD-240654a.jpg]](db_pics/mdpics/MD-240654a.jpg)
![Rhodochrosite, Tetrahedrite, Quartz, Pyrite from Sweet Home Mine (Home Sweet Home Mine), Mount Bross, Alma District, Park Co., Colorado, USA [db_pics/mdpics/MD-240654b.jpg]](db_pics/mdpics/MD-240654b.jpg)