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This is a very flashy, polished nugget of mohawkite, a rare mineral composed of arsenian copper, alg..
Here is a sharp, complex pyrite crystal which combines pyritohedral, cubic, octahedral, and trapezoh..
The Hickory Hill Diamond Mine in Fonda, NY produces many beautiful, clear, Herkimer diamonds, and th..
This specimen of realgar from the Paloma mine features an interesting combination of minerals: under..
This group of 3 penetrating twin cubic crystals is a fine example of Spanish pyrite from the world's..
This is a very flashy, polished nugget of mohawkite, a rare mineral composed of arsenian coppe..
This specimen of the native element graphite is very slippery to the touch (sometimes described as g..
Here is an excellent specimen of anthophyllite, a rare asbestos variety, featuring long blue-gray fi..
Here is a gemmy, rainbow-filled Herkimer diamond (a quartz crystal on steroids!) from Herkimer Count..
This Spanish fluorite specimen features see-through clear, very light blue crystals to .7". The tran..
This is a sharply crystallized ruby crystal from Mysore, India. The main hexagonal crystal is termin..
This is a brilliant, flashy, showy specimen of the rare nickel-cobalt arsenide mineral skutterudite,..
Here is a fine piece of sharp, brightly shiny obsidian from California, featuring very lustrous, mid..
When malachite stalactites are mined in the Congo, they are sometimes cut into thin semi-precious sl..
Here is a superb, highly sculptural cluster of Herkimer Diamonds fromthe HIckory Hill Diggings Mine ..
There are several stacked tiers of tan and orange crystals, separated by .2"-thick strata of solid s..
This intriguing specimen features a large pyrite cube perched on a chunk of marl matrix. The cubic p..
When mottramite was found at the Ojuela Mine in 2011, it took the mineral world by storm. Nothing as..
This is a large specimen of tsavorite garnet, featuring a rich, grass-like green color and shiny lus..
This is a genuine, 100% natural, uncut diamond crystal, crystallized as a rough dodecahedron, and co..
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