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Here is a colorful specimen of jello green fluorite that came out of the William Wise Mine in southw..
This is a specimen of the native element graphite that is very slippery to the touch (some say greas..
The softest mineral on the Moh's scale of hardness is talc, at 1 (diamond is the hardest at 10). Thi..
The remote Altyn-Tyube locality is famous for producing sharp, well-formed gemmy prismatic crystals ..
This specimen of the zeolite mineral scolecite features elongated, thin crystals arranged in multipl..
This is a fine thumbnail-size specimen of demantoid garnet that came from well-known deposits in a m..
The crystals on this fluorite specimen are completely transparent, clear as glass, see-through cryst..
Kunzite is the pink to light purple gem variety of the mineral spodumene, named for discoverer Georg..
This beautiful cluster of dark green to almost black, highly lustrous epidote features crystals with..
This lab-grown alum specimen features a bright crayon green color and sharp, brightly lustrous cryst..
This is a large, lustrous book of iron-rich, midnight black biotite mica. The biotite is formed in t..
This is a gem ruby cabochon with a unique feature - a sharp 6-ray star that shows up when the ..
The stacked tiers of crystals on this specimen of selenite remind me of a Dagwood sandwich. These la..
Skutterudite is a rare nickel-cobalt arsenide mineral. This superb specimen comes from the celebrate..
On this specimen of faden quartz the crystals are doubly terminated, and grew outward from a white l..
This specimen of cyanotrichite was collected in the 1970s from the long-closed classic Grandview Min..
This is a fine specimen of danburite crystals from the world famous Aurora Mine in Mexico. The cryst..
I love the rich, marmalade orange color of this 154 carat spessartine garnet, collected in 2008 from..
This is a cabochon gemstone of black star diopside, featuring a 4-pointed star that is nearly straig..
Here is a specimen of the uncommon mineral babingtonite, from the Roncari Quarry in Connecticut, whe..
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