10 most expensive and precious stones of all time and their significance

4. Benitoite

This beautiful stones is Found nearby San Benito River in California. This amazing stone color is   blue and purple and it was found first time    in 1907. Under UV lights, it gleams a splendid chalky blue. A couple of have been found in Arkansas and Japan, however, the main business mine is in San Benito County, California.