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This cluster of quartz crystals from the Coleman Mine in Arkansas is large and attractively three-di..
This is a piece of grayish brown mica schist that is peppered with light blue sillimanite crystals t..
The shattuckite in this outstanding specimen consists of spherical forms made up of chatoyant radiat..
Anthophyllite is a rare member of the asbestos family, an amphibole mineral. In this specimen, it oc..
Here is a white calcite stalactite from India, recovered from a cavern-like vug in the basalt where ..
Royal blue is the color of the azurite on this crystallized nodule from the D.R.Congo. In a few plac..
Pure native copper is sometimes found as nuggets in the mines in upper Michigan, and this is a great..
Here is a lovely crystal of gemmy citrine quartz, which has been polished to perfection to show off ..
You can see the hollow space inside this tubular fulgurite at both ends. This mineral, with the scie..
This colorful red beryl crystal is nicely formed, with sharp edges, smooth crystal faces, and a flat..
Here is a large specimen of copper from Northern Michigan's Keweenaw Peninsula that is a very shiny ..
This is a very colorful cabinet specimen of cobaltoan calcite that is covered with fine crysta..
On this specimen, peacock blue crystal clusters and sprays of cavansite are perched lightly on sharp..
Pyrite from this mine is extremely rare, and seldom seen. Merelani Hills is renowned for the world's..
This fine specimen features sharp calcite crystals to 1" that are colored a lovely baby pink. The cr..
Ruck's Pit in Florida became famous overnight in 2009 when fossil clams were discovered there that w..
This lovely concretion is an oval-shaped ball with parallel bands of sparkly pyrite crystals set in ..
The termination on this brownish green 2" apatite crystal from the Otter Mine in Quebec is nice and ..
Here is an attractive specimen of anhydrite ("angelite") with sharp, shiny, intergrown crystals.&nbs..
This specimen features a sea of bright turquoise botryoidal bubbles of chrysocolla, around a vug of ..
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