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Lime green, red, blue and purple flash showily from just below the surface of this lovely boulder op..
Dug in 2014 in Pakistan, this is an excellent specimen of this highly coveted gemstone. It is a shar..
This is a specimen of anthophyllite, an amphibole mineral that is a rare member of the asbestos fami..
Biotite is a variety of mica that is the iron-rich analog of clear muscovite mica. Like muscov..
This specimen comes from the Strickland Quarry in Connecticut. It features dark blue indicolite tour..
This imperial topaz crystal, which weighs 12.4 carats, has excellent color for its size, not the typ..
This specimen is a tight penetrating twin cluster of 2 interlocking pyrite cubes, the larger being 1..
Here is a beautiful fluorite specimen with transparent, clear, flashy cubic crystals with no modific..
Here is a very fine 39 gram, golden yellow specimen of copal amber that's about 25 million yea..
During the 2012-13 season, this locality in Morocco produced high quality, bright saturated yellow (..
The fibers on this chrysotile asbestos specimen are thin and fuzzy, and the specimen has a light gra..
I collected this milky quartz specimen with Dick Holmes in 1998 in Haddam, CT, from a pit we excavat..
Here is a Mont Saint-Hilaire combination specimen, featuring fine crystals of black aegerine, white ..
Here is a colorful specimen of blue-green fluorite from the famous Rogerley Mine in England. It feat..
This is a fine crystal of the very rare aluminum borate mineral jeremejevite. The long, thin, 27mm c..
The inside of this crystal is heavily skeletalized, featuring internal hollow areas where the quartz..
The metallic silvery gray crystals on this specimen of Chinese arsenopyrite are sharply formed and h..
This sharp crystal of spessartine garnet practically glows with a captivating, translucent fruity re..
This stunning specimen of selenite features terminated, clear crystals radiating upward and outward ..
This is a fine example of skeletal Herkimer Diamond quartz from Treasure Mountain Diamond Mine in Li..
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