These are the Rarest and Most Beautiful Gems in the World - Page 4 of 9

Benitoite gems

Composition: Barium, Titanium, Silicon, Oxygen

Market Value: $3000–$4000 per carat

Benitoite is blue to purple gemstone first discovered near the San Benito River in California in 1907. When cast under UV lights, it glows a brilliant chalky blue. While a few specimens had been found in Arkansas and Japan, the only commercial mine is in San Benito County, California. Benitoite, the official state gem of California, is a much-prized collector’s gem. It is also sold in jewelry in sizes of one carat or more.