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The long green stalactites in this specimen is a real show stopper! The color of the malachite..
This is a beautiful sunburst of golden rutile, with crystals growing epitactic on the perimeter of a..
This .6" emerald crystal is very sharply formed in a hexagonal shape, with a flat, smooth basal pina..
This is a very colorful specimen of this superb form of chrysocolla. It features a sea of brig..
This Spanish fluorite specimen features transparent cubic crystals in a luminous blue color. The cry..
This is a vibrantly colorful dioptase specimen from Kazakhstan that is a rich emerald green. Almost ..
This exquisite specimen of fibrous malachite is entirely made up of acicular malachite crystals. The..
There is no damage to any of the 4 pyrite cubes on this superb matrix specimen from Spain. The large..
I collected this fine specimen of black tourmaline in 1990 at the historic Powers Farm locality. Bac..
Here is a lovely group of crystals of the rare gemstone, tsavorite garnet. The color is a luscious g..
This specimen is a great example of one of the special properties of staurolite: it is found as twin..
On this fine prehnite specimen the large botryoidal bubbles are beautifully formed, grouped together..
In September 2014, miners at Tasmania's Adelaide Mine finally reached the end of the fabled River Ru..
This is a very fine, classic datolite cluster with sharp, well-terminated, gemmy crystals from Dal'n..
Here is a specimen that that is covered with a host of bright turquoise botryoidal bubbles of chryso..
Copper nuggets from Michigan are rarely this large, and this one, which weighs 1.7 pounds, has so mu..
The top surface of this specimen of red cap amethyst is colored a vivid blood red color by inclusion..
Under the right conditions, pyrophyllite crystallizes in beautiful radiating rosettes of acicular cr..
The contrast between the bright pink gemmy tourmaline and the light blue cleavelandite on this speci..
This crystal is a delightful single crystal of lemon yellow apatite. The color is bright, and the cr..
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