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Here is an Ethiopian gem fire opal that's filled with luminescent, shimmering flashes of blue, green..
Here is a superb specimen of cubic magnetite with a sprinkling of talc from the now-famous find in 1..
This double terminated Herkimer diamond quartz crystal is sharp and gemmy, and is jam-packed with sh..
This aqua aura quartz crystal has good see-through clear areas, with brilliant luster and excellent ..
This specimen, which came from the 2015 season when we visited the mine, features sharp, gemmy, see-..
From Madagascar comes this amazing fossil oyster, of the species Rastellum carinatum. The unusual ri..
The phantom layers in this polished slice of fluorite from China are sharply defined and clearly del..
This colorful specimen of aqua aura quartz crystals is beautifully iridescent, with brilliant luster..
Here is a dripping sulfur stalactite, in an interesting, sculptural shape and colored a brilliant bu..
Graves Mountain is well known as the source of what are considered the finest rutile crystals in the..
Here is a nickel iron meteorite that weighs 156 grams from the celebrated Campo del Cielo meteorite ..
The Xian Hua Lin Mine is famous for sharp, gem clear crystals of light green fluorite, and this is a..
This exquisite specimen of fibrous malachite is entirely made up of acicular malachite crystals. The..
I visited an imperial topaz mine near Ouro Preto during my 2016 trip to the Brazil. The miners desce..
Here is a very fine small cabinet specimen of cobaltoan calcite, with fabulous pink color. The displ..
Here's a sharply tapering crystal of clear quartz that has grown in the rare tessin habit formation ..
This is a fine example of plumbogummite pseudomorphs of pyromorphite. This piece came from a signifi..
The Kawah-Ijen volcano in Indonesia has a unique feature: it discharges molten sulfur which drips fr..
The sulfur in this amazing specimen has dripped to create a formation much like the sides of stalact..
My friends from Poland introduced this new lab grown mineral at the Tucson Show in 2015, and it was ..
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