Mica 8mm Round Green - 15-16 inch Color_Tan Gem Silica is the rarest

Gem Silica is the rarest and highest form of Chrysocolla

aluminum oxide and other metal oxides

who first discovered the stone in Southern California in 1868

although sometimes mistaken for Jasper

Mica 8mm Round Green - 15-16 inch Color_Tan Gem Silica is the rarestMica is a mineral name given to a group of minerals that are physically and chemically similar. They are all silicate minerals, known as sheet silicates because they form in distinct layers. Micas are fairly light and relatively soft, and the sheets and flakes of mica are flexible. Mica is heat resistant and does not conduct electricity. There are 37 different mica minerals. The most common include: purple lepidolite, black biotite, brown phlogopite