Biotite 6mm 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

This prompted an alternative name for the gemstone: Princess Blue

non-crystalline mineraloid consisting of a high percentage of carbon

pressure and a stabilizing agent or resin

violet or indigo

White Howlite is named for Canadian mineralogist Henry How

the result was glass permeated with thousands of tiny metallic sparkles

It is known for its abstract designs in rusty red

a variety of Feldspar

which occurs in many colors

and brown as well as pink

ranging in color from pale yellow to golden yellow

sometimes referred to as Crocodile Jasper for its deep green color and deep brown or black oval rings reminiscent of crocodile skin