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Mineral Specimens with Pyrite
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9.4 x 8.4 x 4.7 cm Great specimen of cubic pyrite crystals.
11.5 x 8.7 x 4.9 cm. A NEW FIND from the prolific De'an area of mines - and a really unique one at that: a cluster of balls of faceted-looking pyrite, glittery and golden, on the tips of a densely-packed cluster of milky quartz crystals!
4.7 x 4.5 x 3.1 cm. Pyrites come from Peru by the ton, but the really exceptional ones like this are NOT common. In person, it is actually a whole lot better - with MIRROR-metallic luster. Truly sculptural and a standout in quality, or Gene Meieran would not have had it. Ex. Gene Meieran Collection.
5.8 x 3.9 x 3.5 cm. This is a compound crystal of pyrite from the very obscure Spanish locality of Ambasaguas; the vast majority of Spanish pyrites you see on the market are the pristine cubes from Navajun. This is completely different in form and even surface character. You have these very complex modifications of the cube all the way around - this is a floater - and, a strange scaly-looking terracing on certain of the faces. Interesting!
4.4 x 4.2 x 3.9 cm. A pretty little combo piece of shiny, golden pyrite cubes set in a nest of slender, gemmy quartz crystals.
13.9 x 10.9 x 4.5 cm. Pyrite is mined by the ton in Peru, but really standout specimens worthy of a good collection are still exceptional. This is one of those, and it has it all! First, the pyrite crystals are ringed around a central quartz-filled recess, which gives the specimen very unusual "structure" compared to the normal plate of wall-to-wall crystals. Secondly, the crystals have the absolute top mirror-brightness to them, some of them with pretty micro-terracing on their faces. Small sphalerites are sprinkled here and there amongst the pyrites.
5.9 x 5.4 x 5.2 cm. This glittering golden pyramid is actually a pseudomorph of pyrite after an unusually formed large crystal of pyrrhotite - on close inspection, a compound crystal with a narrow hollow running down the center. Little calcites have formed on top of the pyrite. Ex. Stoudt Collection.
5.4 x 3.9 x 3.4 cm. The old Lawrence Conklin label that accompanies this specimen correctly identifies the form of this pyrite as the very rare "iron cross" - and there are TWO complete ones here having this form, one 1.5 cm and the other just under 1 centimeter. Both on matrix! And really aesthetic, with the crystals isolated on a bed of milky quartz crystals. Ex. Dave Stoudt Collection. VERY RARE material!
17.9 x 13.8 x 9.4 cm. The specimens from this unique find of about a year and a half ago are long gone from the market. Here is an example from the find that amply shows off why it was so special: glittery golden pyrite selectively deposited along the edges of large crystals of calcite, up to 6 cm across. On many of these specimens there was not very good coverage of the pyrite, but this one is richly decorated with it - so it has both fine quality AND size for the find.
5.5 x 5.3 x 4.4 cm. If you can get past the fact that they are "just" pyrites, you have to admit that these PERFECT cubes on matrix from Spain are amongst the most striking crystals in the mineral kingdom. Non-mineral people usually cannot believe that they form naturally, in fact! This specimen, looking like modern art, features a central cube 3 cm across, with three others cubes intergrown with it in a perfect arrangement on 3 different sides. A really amazing mineral specimen!
7.7 x 4.8 x 2.2 cm. From the new find in November 2004. Andorite is lead, silver, antimony sulfosalt and was named for the Hungarian mineral collector Andor von Semsey (1833-1923), who holds a remarkable distinction for having two mineral species named after him (andorite and semseyite). This mine at Oruro dates Spanish mining as far back as the year 1595 and was mined by Incan Indians for several centuries prior. In all the years of mining, these are undoubtedly, the worlds finest Andorites extant! These specimens were extracted from the same vein system worked by the father of Bolivian mineralogy, Federico Ahlfeld. Ahlfeld worked the San Jose mine and Itos mine (the other significant andorite locality at the same mountain in Oruro) when the mines were used predominantly as a major sources of tin to the United States during WWII. The best examples of the species have come from Bolivia. This specimen consists of layered, steel-grey, semi-lustrous crystals of the rare lead, silver, antimony sulfosalt Andorite sitting atop pyritohedral Pyrite matrix. The main Andorite crystal is in great condition, while the others are contacted. The important aspect of this specimen is the fact that the Andorite crystals are on PYRITE matrix! Ex. Brian Kosnar.
9.7 x 6 x 6 cm. A very interesting combination piece of attractive (great metallic luster!) Pyrites that range from very fine to cubes up to 1 cm. These are intergrown with white, and fluorescent, Calcite crystals. Many of these are doubly-terminated, and they range up to 1.8 cm in length. This is a quality, and distinctive, specimen from an unusual locality. Ex. Charlie Key.
6.5 x 6.2 x 6 cm. A fine example of the typical form of this classic Utah pseudomorph. This piece if from a different pocket found at a later period at the mine. This is a superb and very large example of the more well-known form of this pseudomorph - a floater of sculptural, interpenetrating cubes, with an antique bronze luster and micro striations on their faces. Ex. Richard Hauck Collection.
9.9 x 7.4 x 7.0 cm. One thing you can say about this large specimen from the Kalahari Manganese fields - it is VERY unusual and striking! What you have is a cluster of pyrite crystals atop the gray manganese-rich matrix that have pseudomorphed to limonite - so you are left with these bright rust-colored euhedral crystals piled atop a dramatically-contrasting gray matrix.
3.4 x 2.8 x 2.8 cm. An uncommon New Mexico pseudomorph of goethite that has replaced a sharp compound crystal of pyrite - apparently completely, because when you pick it up, you can clearly feel the difference in weight. Dave Stoudt obtained this specimen on a trip to New Mexico in 2001.
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Rob Lavinsky, rob@irocks.com
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share specimen![Pyrite from Shangbao Pyrite mine, Leiyang Co., Hengyang Prefecture, Hunan Province, China [db_pics/mdpics/MD-165198a.jpg]](db_pics/mdpics/MD-165198a.jpg)
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![Pyrite, Quartz from Cananea, Mun. de Cananea, Sonora, Mexico [db_pics/mdpics/MD-165748b.jpg]](db_pics/mdpics/MD-165748b.jpg)
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![Pyrite, Calcite from Gloria Mine, Kalahari manganese fields, Northern Cape Province, South Africa [db_pics/mdpics/MD-168105b.jpg]](db_pics/mdpics/MD-168105b.jpg)
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