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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..
This gem clear single Herkimer diamond quartz crystal is sharp and well formed all around. It is dou..
This is a fine and good-sized terminated crystal of yellow-golden barite from Cote d'About in France..
Here is a specimen of pink opal that comes from the Acari copper mining near Nazca. Pink Andean opal..
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