Black Mica Muscovite 12mm Round - 15-16 Inch Round AAA Grade It is known for its

It is known for its colors to to dark green and mustardy yellow

Moss Agate is a variety of Chalcedony

grinding wheels and cutting disks

The image shown has multiple cabochons to give you an idea of the range possibilites of the colors

Black Mica Muscovite 12mm Round - 15-16 Inch Round AAA Grade It is known for itsMica 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