Black Mica 6mm Round A Grade - 15-16 Inch Pair Legend has it that the

Legend has it that the stone is the petrified remains of ancient dragons

midnight blue glass with flecks of copper suspended within it

known for its incredible hardness

Onyx is a black and white banded Chalcedony

as well as red or brown either from oxidation or Hematite inclusions

Black Mica 6mm Round A Grade - 15-16 Inch Pair Legend has it that theMica 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