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This gem clear single Herkimer diamond quartz crystal is sharp and well-formed all around. It is sha..
The shiny silver color of this molybdenite crystal is really attractive, as it flashes brightly in t..
This is a very flashy, polished nugget of mohawkite, a rare mineral composed of copper, algodoite, a..
Here is a colorful specimen of pink opal gem rough that comes from the Acari copper mining area near..
When petrified wood is sliced and polished, the results can be highly dramatic. This is a grea..
This is a very large, lustrous crystal book of iron-rich midnight black biotite mica. The biotite is..
This is a polished slice of agatized petrified wood that is amazingly well preserved. The highly det..
Up until mottramite was found at Mapimi in 2011, none had been found for over 20 years, since the Ts..
This is a naturally magnetic specimen of magnetite, also known as lodestone because of its magnetism..
On this specimen the 4 layers of selenite crystals look like a Dagwood sandwich. Between the layers ..
You will be amazed by the rich, saturated, crimson red color of this fine example of arkanite on mat..
The brilliant blues, magentas, greens, and yellows on this specimen of bismuth are really eye-catchi..
This is a large crystal of the rare gemstone, tsavorite garnet. The color is a lovely grassy green, ..
This gem clear Herkimer diamond quartz crystal cluster is sharp and well-formed all around. The larg..
Until recently the famed diggings in Mysore, India produced many fine ruby crystals like this one. S..
Here is a classic specimen of Red Cloud wulfenite crystals in a bright, colorful example. The crysta..
Green quartz from Greece, called prase, has always been in high demand, and now that the remote site..
Here is a fine specimen of pyrite, crystallized as a very sharp (and 100% natural) cubic crystal. Th..
The lithium-rich pegmatite mineral petalite is rare and highly sought after by collectors. The piece..
This is an exceptional matrix specimen featuring bright green gemmy crystals of green fluorite on ma..
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