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This is a very clean and astonishingly clear Herkimer diamond crystal from HIckory HIll Diggings. Th..
The rich color of this peridot crystal is a rich green that really draws the eye. The crystallizatio..
Mohawkite is a rare blend of arsenian copper and two other rare minerals: algodoite and domeykite. T..
Here is a specimen of the very rare lithium pegmatite mineral, petalite. It is a fine crystal sectio..
This is a dramatically sculptural specimen of jade green quartz (prase) with good terminations on el..
This citrine-like barite crystal comes from central France, from a small quarry where it was mined b..
This is a fine specimen of octahedral fluorite from a classic New England locality: the William Wise..
Here's a beautiful graduated set of 10 GOLDEN PYRITE CUBES (also known as FOOL'S GOLD) featuring shi..
This is an extra-large, lustrous book of iron-rich midnight black biotite mica. The biotite is forme..
Here is a fine specimen of pyrite, formed into a very sharp (and 100% natural) cubic crystal. The ed..
This specimen features mossy green micro-crystals of mottramite arrayed in botryoidal form. The botr..
The mimetite crystals on this specimen are spread out over several sides of the piece and are colore..
This is a great specimen of fire agate in a chalcedony bird's nest matrix from Mexico. The iridescen..
Here is a beautiful peridot crystal specimen in a gemmy grass green color. The crystal is well-shape..
This fine ruby crystal comes from the famed diggings in the Mysore District in southern India, which..
Here is a genuine diamond crystal weighing 1.5 carats. This specimen-quality gemstone (sorry, it can..
Here is a rare terminated gemmy crystal of diaspore from Turkey. Diaspore is an aluminum oxide hydro..
In crystallography, growing crystals of certain elements and molecular compounds rapidly causes them..
Artinite from California is some of the best found anywhere in the world, and this specimen is a ver..
Here is a lustrous, classic blue crystal of jeremejevite from Namibia. Jeremejevite is only found in..
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