Black Mica Muscovite 12mm Round - 15-16 Inch Round AAA Grade Because of its softness

Because of its softness

bubbles and crystal to rich layers that form as lava flows onto the surface of stone — and can look very different depending on how that lava erupts

Moss Agate is a variety of Chalcedony

Jasper is an opaque

Hematite is an iron oxide and one of the few gemstones with a metallic luster

Black Mica Muscovite 12mm Round - 15-16 Inch Round AAA Grade Because of its softnessMica 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