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Description

Biotite 8mm Round Orange - 15-16 InchBiotite is a name used for a large group of black mica minerals that are commonly found in igneous and metamorphic rocks. These include annite, phlogopite, siderophyllite, fluorophlogopite, fluorannite, eastonite, and many others. The name "biotite" is used because these minerals generally cannot be distinguished without optical, chemical, or x ray analysis. Biotite was named in honor of the French physicist Jean Baptiste Biot, who performed early

with a Mohs Hardness of 8

white and occasionally gray or brown

Red Botswana Agate displays highly defined parallel banding

its variations seem to depict landscapes and other images

Amazonite is a member of the feldspar family

A Manganese inosilicate (or chain silicate)

Garnet has been used for adornment and spirituality by myriad cultures and civilizations throughout history

the Sun Stone

but those varieties are transparent

everything from colorless to black

from light blue to lapis blue to cobalt

mustard yellow