Hyalite-Coated Chalcedony and Fluorite, SK Star Claim #2, Juab Co., Utah
This interesting and unique fluorescent specimen looks like something you'd expect to find in an underwater coral reef. Collected from...
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Fluorescent Minerals from SouthWest USA (except AZ)
Red Trinitite, a Piece of Atomic History
Red trinitite is technically not a true mineral, because it was not formed through a geologic process. Rather, this brick-red colored...
Sphalerite, Ophir Hill Mine, Tooele County, Utah
Sawn slab of zinc ore consisting of sphalerite, galena, and other unidentified minerals, from the Ophir Hill Mine, Tooele County, Utah. ...
Selenite Flower, Sheridan County, Wyoming
At first glace, this looks like a classic selenite rosette from the Red River Floodway, Manitoba, Canada. But no, guess again! This...
Tiffany Stone, Brush Wellman Mine, Delta, Utah
Tiffany stone is a complex rock composed of opalized fluorite with bands and veins of chalcedony, manganese oxide and bertrandite. The...
Yttrofluorite, Joseph Mine, Rio Arriba County, New Mexico
Yttrofluorite is a variety of fluorite in which the rare earth element yttrium substitutes for some of the calcium in the fluorite (CaF2)...
Yttrofluorite, Joseph Mine, Rio Arriba County, New Mexico
Yttrofluorite is a variety of fluorite in which the rare earth element yttrium substitutes for some of the calcium in the fluorite...
Hydrozincite, Sphalerite from Green Monster Mine, Nevada
One of the many specimens collected in the Green Monster Mine, Sandy Valley, Nevada, in early January 2022. The blue-white fluorescent is...
Green Fluorescent Fluorite, Fourmile Creek, Colorado
Rare green fluorescent botryoidal fluorite from the Fourmile Creek area, near Canon City, Fremont County, Colorado. Fluorite in...
Scheelite, Ophir Hill Mine, Tooele County, Utah
Brightly fluorescent, submillimeter, octahedral crystals of scheelite on matrix; from the Ophir Hill Mine, Tooele, Utah. This specimen...
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