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This copper nugget has been polished on both sides to a brilliant metallic luster, showing off the b..
Here is a fossil ammonite in a lovely antique tan color with fine details. It is the coiled sh..
Powder blue best describes the bright, colorful shattuckite on this fine quality specimen from Namib..
This is a fine specimen of the very rare lithium pegmatite mineral, petalite. It is a large crystal ..
Inside this specimen of agatized coral are a series of finger-like stalactite ridges. They are trans..
Here is a 2.6 carat transparent phenakite crystal with a very sharp six-sided termination on a hexag..
Here is a clear, 34.6 carat section of a phenakite crystal from Russia, with great gemmy clarity. It..
The gum drop green color of this fluorite octahedron is exceptionally rich, and the smooth surfaces ..
This is a fine cluster of cuprite crystals, joined together to form a single octahedral crystal. Thi..
In the copper mines of the Upper Peninsula of Michigan, pure copper is found in nuggets, like this f..
Here is an excellent specimen of anthophyllite, featuring long blue-gray fibers that are locked soli..
Here is a nice specimen of strangely crystallized light rose quartz from India. In addition to its p..
This colorful 1.4 pound copper nugget from Michigan has been polished to bring out the rich copper c..
For over a hundred years, the black tourmaline crystals found at Power's Farm in Pierrepont were bel..
This is a lovely specimen of petalite, a rare lithium-rich pegmatite mineral. This section of a crys..
Specimens of fulgurite are always fascinating, because they are caused by a lightning strike in sand..
This is a specimen of solid purpurite, a manganese phosphate mineral, from Namibia. It is colo..
This is a superb specimen of dravite tourmaline, the manganese-rich member of the tourmaline group (..
Here is a fine specimen of sillimanite from New Hampshire, where a friend of mine collects these cry..
This siderite specimen is an old-time and superb piece from the historic Connor Pond locality in Oss..
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