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This gemmy single Herkimer diamond quartz crystal on a scrap of matrix is sharp and brilliant, and i..
Here is a nice specimen of Okoruso fluorite featuring bluish green cubic crystals to 10 mm on edge. ..
This specimen is a very flashy, polished nugget of mohawkite, a rare mineral composed of arsenian co..
On this specimen, anhydrite crystals form sharply defined paintbrush terminations which are well dev..
Here is a large, elaborate copper formation that shines with a bright metallic luster and is colored..
Here is a beautiful specimen of native copper which has been created by melting it, then pouring the..
This is an extra large garnet crystal that is unusually well-formed and pretty remarkably sharp for ..
Blue ball fluorite from China was a big hit in Tucson in 2004, and this specimen is an unusually fin..
This is a specimen of biotite mica that is the iron-rich, dark brownish black cousin of muscovite mi..
Here is a fine cluster of yellow-green andradite garnet crystals to 13 mm covering both sides of the..
Here is a flashy, mirror-faced specimen of pyritohedral pyrite crystals in a glowing brassy golden y..
Under the right conditions, pyrophyllite crystallizes in beautiful radiating rosettes of acicular cr..
Crystals of molybdenite (molybdenum sulfide) are rare, and this one is a great example. The silver c..
Mohawkite is a blend of arsenian copper and two other rare minerals: algodoite and domeykite. ..
A gemmy fluorite specimen like this piece from the Rogerley Mine is always a treat, and this one is ..
The crystals on this piece of blue fluorite are sharply-formed cubes and the color is a rich royal b..
Here is a specimen of splash copper, an artistic piece made using native copper from Michigan. The f..
Here is a sharp, tabular wulfenite crystal that hails from the world famous Red Cloud Mine in Arizon..
This is an aesthetic specimen of green quartz (called prase quartz) from the old classic locality on..
This is a fine gem crystal of the prized form of topaz known as imperial topaz, named for the Russia..
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