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Here is a polished log of petrified wood that is remarkably well preserved, with the much of the bar..
This is a specimen of chrysotile asbestos, with fibers that are thin and fuzz. The specimen has a li..
Here is an excellent specimen of anthophyllite, featuring long blue-gray fibers that are locked soli..
Here is a classic specimen, a Red Cloud wulfenite crystal perched on a tiny dab of matrix. The cryst..
The crystals on this fine specimen of adamite are super sharp, have a bright, gleaming luster and ar..
I took my family to the DR in 1988 for a vacation, and my sons and I took a side trip to the La Cumb..
You will be amazed by the size and sharpness of this huge almandine garnet crystal. Rarely do garnet..
Here is a wholesale lot of 4 beautiful specimens featuring lightly frosted and translucent sea-foam ..
Endlichite is an uncommon variety of vanadanite in which arsenic has substituted for vanadium in the..
Here is a flat with 8 specimens of well-crystallized libethenite, a rare copper phosphate mineral. T..
Here is a flat of 10 specimens of pumice, a very light and porous volcanic rock formed when a gas-ri..
This specimen of weloganite comes from the Francon Quarry, which is the type locality (it is also th..
Neptunite comes from only a handful of localities worldwide, but the very best specimens of this rar..
Here is an outstanding example of an enhydro quartz crystal, with tiny air bubbles floating in sever..
This emerald crystal is colored a gorgeous, slightly blue shade of green that is typical of the colo..
This gemstone is a star diopside that features a bright 4-point star that is easily visible in the s..
This is a very colorful dioptase specimen from Kazakhstan that is a rich emerald green with a hint o..
Petalite is a rare lithium mineral that forms in clear gemmy crystals in some pegmatites. This cryst..
Here is a specimen of scolecite, featuring crystals that are clear right up to the tips. The l..
There are over half a dozen apatite crystals on this matrix specimen, and they are a bright golden y..
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