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Mineral Specimens with Pyrite
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On a matrix of crystallized, splendent pyrite, are nestled botryoids of translucent light green prehnite. The prehnite balls get as large as 1.5 cm. There are also lustrous, white crystals of what might be natrolite scattered on the prehnite. Unusual for the locality and for that matter, unusual in that it is associated with pyrite - i cannot think of another prehnite/pyrite association offhand 7.2 x 4.2 x 3.2 cm
Perched on a matrix of druzy white quartz, are three splendent and super-sharp crystals of pyrite. The crystals, which measure up to 2 cm across, are equant cubo-octahedrons. The top one hangs off and is complete all around! Very aesthetic! 10.2 x 7.1 x 6.3 cm
6.3 x 5.9 x 5.4 cm. This Peruvian pyrite specimen has intense golden metallic luster, wonderfully sharp cuboctahedral crystals, and an aesthetic overall form, with the larger crystals on the bottom and smaller ones piled on top. The faces have gentle striations which add to the attractiveness. Ex. Stoudt Collection.
This deposit has produced thousands of pyrite specimens but, not many as nice as this piece which is outstanding. A single, equant, bright metallic cube of pyrite measuring prceisely 1 inch square sits perched on matrix (possibly stabilized or repaired after coming off in preparation as are most such specimens). This IS from top percentile material for the finds. 6.4 x 5.1 x 4 cm
Considering that this is an “oldtimer” from Leadville, it is in remarkably good condition. The bright mirror luster and intergrown pyrite cubes to 2 cm, along with the sculptured appearance, make this specimen one of the nicest specimens I have seen from this venerated old locality. Old Burminco label. 10 x 7.3 x 2 cm
This slightly elongated, almost pristine pyrite crystal, which measures 3 cm in length, sits jauntily on its clay matrix. It exhibits the finest mirror –like metallic luster. Of the many thousands of these that I have seen, the quality and aesthetic arrangement makes this particular piece stand out! Note that most of these are prepped and the pyrites fall out but get put back in after the trimming out is done, so it is most likely repaired. 9.3 x 6 x 3 cm
VERY RARE IN THIS QUALITY! Zacatecas is a classical locality for fine Jamesonite specimens, including this one. It features matte black, thick and elongated crystals up to 3 cm in length. In addition, there are well placed bright, lustrous pyrite crystals. In recent years there has been a paucity of this great sulfosalt mineral. This locality still ranks among the best for species, because of the thickness and sturdiness of the crystals which normally occur simply as a jumble of acicular needles from other places. 6.8 x 6 x 4.8 cm
Pyrites are common from Peru, but NOT LIKE THIS! Not only are the crystals incredibly mirror-bright and beautifully striated, but they have formed in two interconnected knobs, to form an exquisitely sculptural specimen. This is truly one of the most spectacular pyrites I have ever seen and is MUCH BETTER in person. Pics cannot convey a piece so 3-dimensional and lustrous! 11.5 x 6.6 x 6.2 cm
Cubes of purple fluorite, intergrown with gemmy quartz needles, on a matrix of tetrahedrite and pyrite. Sparkling and colorful! 5.4 x 4.3 x 2.6 cm
It is hard to argue with how aesthetic this lustrous and complex pyrite crystal is sitting in the calcite. For sheer quality, this is hard to beat for a franklin pyrite, I am told. Beyond that, it is an important historical specimen that, I am told, would have been collected in the mid-1800s. It has Harvard #113145 attached to the side and an old dealer price of $275 on the original thumb box 2.9 x 2.1 x 1.9 cm
A beautiful, porcupine needle-like plate of glassy, quartz needles to 2.8 cm with interspersed galena and pyrite crystals on massive sulfide matrix from the famous Huaron District of Peru. Expertly collected, the only damage is to periphery quartz crystals. Choice material from the Lewadny Collection. MUCH BETTER IN PERSON. 7.0 x 6.5 x 4.0 cm
A showy plate of brilliant, brass-yellow, striated pyritohedrons to 2.1 cm nicely covered with contrasting, matte-finish, etched galena crystals from the famous Huanzala Mine of Peru. The crystals are undamaged. Ex Marty Lewadny Collection of Winnipeg, Canada. 9.2 x 8.0 x 3.0 cm
These beautiful, lustrous pyrite floater "suns" formed between an ancient bed of shale and clay near Sparta, Illinois. This one is complete all-around and front and back. 8.7 x 8.7 x 0.7 cm
A super-elegant specimen of very slightly pink quartz crystals on an exquisitely-trimmed matrix of quartz and sparkly golden pyrite. How the miners got this out of the pocket this way (in 2001, by the way) is anyone’s guess. 7.1 x 5.0 x 4.1 cm
Two, VERY AESTHETICALLY connected, mirror-bright, brass-yellow pyrite cubes from Logrono, Spain. Trivial bruising on a couple of edges and corners is certainly not detracting on this beautiful specimen. Old dealer stock of Dr. Gary Hansen and not shown since the early 1980s! 5.5 x 5.1 x 4.1 cm
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Rob Lavinsky, rob@irocks.com
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