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Mineral Specimens with Pyrite
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5.8 x 4.8 x 4.4 cm. A stunningly pretty specimen of translucent, bladed baryte crystals framing a field of shockingly lustrous, wonderfully hoppered crystals of galena. The galenas and barytes sit on a base of golden pyrite, which adds a pretty color accent around the edges.
7.5 x 5.6 x 4.8 cm. A powdering of glittery golden pyrite decorates the edges of these milky rhombohedrons of calcite from China.
6.3 x 4.5 x 4.0 cm. Gene Meieran, from whose collection this specimen came, was a fan of Butte pyrites, judging from the number of them from his collection. This was one in a drawer set of 40 pyrite miniatures and small cabs chosen for aesthetics and representative crystal habit from classic locales. Here are glittery crystals to 2.8 cm in association with milky crystals of quartz. You can see some subtle natural etching here and there on the pyrites. Superb balance and color contrast make this a great miniature. It probably came out in the 1950s or 60s.
10.5 x 8.4 x 5.8 cm. This is a really fine (and large) specimen from a strange and beautiful find in China in 2006, of large calcite crystals with edges selectively "gilded" with bright golden pyrite. Some of the specimens had rather sparse pyrite, but here, it richly coats the crystal edges.
4 x 3.5 x 3.2 cm. This excellent single octahedron has excellent luster, modified corners, and subtle but very attractive growth patterns along the faces. There is minor attached matrix and some edge wear. This is a classic old locality.
3.2 x 2.9 x 2.8 cm, 3.1 x 3.1 x 2.8 cm. These super-sharp pseudomorphs are classic from this locality. Here are two of them - one large cube, and a smaller specimen with two intergrown ones. goethite has replaced the original pyrite atom by atom, retaining the pyrite form. Accompanied by an old Burminco label. Ex. Richard Hauck Collection.
2.4 x 2.4 x 1.9 cm. Old Butte pyrites are American classics. This is a superb thumbnail featuring a crystal of textbook form with beautiful striations on its faces.
7.9 x 3.9 x 3.9 cm. Like Butte pyrites, fine Colorado pyrites are just not abundant anymore. Here is an old-time specimen with incredibly sharp and bright crystals on a base of massive pyrite.
4.4 x 3.4 x 2.8 cm. An aesthetic example of this classic combination from the Spruce Ridge pyrite and quartz deposit located near the crest of the Cascade Range in Washington and first explored in the 1950s by Bear Creek Mining. The quartz points, with a slight orange tint from hematite inclusions, decorate the sides of a fine, golden-metallic floater crystal of pyrite. Ex. Dick Jones Collection (assembled in the 1960s-1970s).
6.0 x 3.4 x 3.0 cm. Pyrite is not the first thing you think of when you think about the classic Mexican locality of Zacatecas, but the mines did produce a modest number of good pyrite specimens back in the day. This is a large, blocky crystal, with a fine golden-metallic sheen to it. Those are natural jagged bevels on the edges. Old material from the 1970s. Ex. Consie Prince Collection.
9.5 x 6.0 x 3.6 cm. Lustrous, translucent, light gray calcite rhombs to 2.0 cm richly and attractively cover the chlorite schist matrix plate on this fine specimen from the NEAT tunnel workings in Canton Uri, Switzerland. The sparkly pyrite microcrystals are a very nice accent. Ex. Brent Lockhart Collection.
6.4 x 2.8 x 2.3 cm. A unique specimen from the Czech Republic. A highly lustrous, brassy, 2.0 cm pyrite cube and spherical aggregates of tiny pyrite cubes are perched on a silicified piece of wood. You can see the vertical ribbing on the wood. Ex. Keith Proctor Collection.
12.2 x 11.4 x 0.6 cm. This lustrous, amazing form of pyrite is found in narrow seams of shale between seams of coal in the mines near Sparta, Illinois near the 300 foot level. Scientists are not sure of their origin. The main theory is that they are an undetermined fossil that has been replaced by pyrite.
6.0 x 5.4 x 3.8 cm. Gleaming, razor-sharp, snowy-white rhombs of calcite are piled up on a matrix of intermixed, massive pyrite and sphalerite. You can see some tiny chalcopyrites speckling the surface of the calcites. Ex. Dave Stoudt Collection.
5.4 x 5.3 x 5.0 cm. Translucent, waxy lustre, stepped faces calcite scalenohedrons surround a bar of scintillating pyrite microcrystals like sharp mountain peaks on this showy and excellent specimen from the La Sirena Mine of Guanajuato, Mexico. This superb specimen is from the Karl Warning Calcite Collection and was purchased from Fender Natural Resources in 2000 in Dallas. Classic Guanajuato material.
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Rob Lavinsky, rob@irocks.com
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share specimen![Baryte, Galena, Pyrite from Huaron Mining District, San Jose de Huayllay District, Cerro de Pasco, Daniel Alcides Carrión Province, Pasco Department, Peru [db_pics/mdpics/MD-203072a.jpg]](db_pics/mdpics/MD-203072a.jpg)
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