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This is an amazing specimen of pyrite, crystallized as a very sharp (and 100% natural) cubic crystal..
Here is a sharp, terminated tangerine quartz crystal with a lovely reddish-orange color and nice tra..
Here is a rutile specimen that comes from a little-known locality in north-central Vermont, the Davi..
Tektites are extraterrestrial in origin, resulting from the impact of a large meteorite that crashed..
Here is a lovely fluorite octahedron from China. The fluorite has been cleaved along its natural cle..
Colorful doesn't begin to describe this specimen of chalcopyrite, which goes by the nickname, "peaco..
Rosasite, which forms in the oxidation zones of zinc-copper deposits, is occasionally found in this ..
Here is a fluorite specimen that is quite unusual: it is a tight cluster of stalactites made up of c..
This is a good specimen of gahnite, with sharp, dark blue crystals on a pyrite and milky quart..
The classic Coyote Front locality is famous for producing fine grossular garnets which feature excel..
Here are 25 fluorite octahedrons from the Denton Mine. Each piece of fluorite has been cleaved along..
Here is a 15.2 gram polished nugget of chrysoprase from the Old Yerilla Mine in Western Australia. T..
On this chrysotile asbestos specimen the hair-like crystals look like fibers that are thin and fuzzy..
The neon bright turquoise blue color is the main feature on this specimen of peacock ore, a form of ..
I collected this striking specimen of diopside in 1997 in southern Quebec, at the old Orford Nickel ..
Here are 11 sawn slices of ametrine, showing the characteristic internal shapes that are characteris..
These 4 specimens of orpiment feature colorful crystals to over 1" long, which is pretty good sized ..
Talc is a 1 on the Mohs hardness scale, making it the world's softest mineral, and it can be scratch..
This is a lovely esample of boulder opal, a beautiful specimen from probably the world's best known ..
Here is a lustrous, large-for-the-species crystal of jeremejevite from Namibia. Jeremejevite is a ra..
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