10 Gemstones Much Rarer Than Diamond 

First discovered in Siberia at the end of the 19th century, gem-quality crystals of jeremejevite (i.e. minerals large and clear enough to be cut to shape) have since been recovered in limited supplies in Namibia. Pictured here is jeremejevite that has formed in a rare, clear-crystal form the largest faceted jeremejevite on Earth. [Photo Credit: Fred Kruijen | CC BY-SA 3.0]

You may also like...