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This chrysotile asbestos specimen features fibrous, hair-like crystals that are thin and fuzzy, and ..
This is a large 1.9" Herkimer diamond crystal from the Hickory Hill Diamond Mine. It is double termi..
Here is a Milpillas azurite specimen with acicular green silky malachite crystals. The dark blue col..
Here is a very aesthetic specimen of cubic pyrite crystals in the creamy marl matrix they grew in. T..
Mined in the 1970s, the cyanotrichite crystals on this specimen are like fine hairs, sticking up and..
This is a lovely double-terminated crystal of kunzite in a delightful, pastel shade of lavender pink..
The overall impression created by the piece is very dramatic-the intense, deep ruby red color draws ..
The two large octahedral alum crystals on this piece are up to 2" across, and are gemmy and highly s..
The color of the crystals on this lab-grown specimen of arkanite is a rich cherry red, which is real..
This is an historic specimen of the rare mineral babingtonite, from a long-closed quarry in Peabody,..
The rich electric-blue color of this azurite is really exciting, and the flashy crystals grew on the..
Mexico's Milpillas Mine has finished mining the last of the oxidized zone that produced these world-..
Here is a lustrous wulfenite crystal that came out of the world-famous Red Cloud Mine in Arizona in ..
The flashy colors on this brilliantly luminous specimen of ammolite are psychedelic hues of red, ora..
Metallic silver crystals flash brightly with reflected light on this fine specimen of Chinese arseno..
This intriguing specimen features a near perfect, complete pyrite cube that is 1.5" from tip-to-tip ..
These corundums from Madagascar are generally called sapphires, but I call them ruby/sapphires becau..
There are over a dozen apatite crystals on this fine matrix specimen, and all are a bright golden ye..
On this specimen, the azurite crystals are thin plates, and are up to .9". They are sharp and shiny,..
Merelani Hills is renowned as the world's only location for tanzanite crystals, but pyrite from this..
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