Green Mica 8mm Round A Grade - 15-16 Inch Freeform Cval Petrified Wood Agate is formed

Petrified Wood Agate is formed from the petrifaction process of primeval trees over the course of many years

Natural Agate is a variety of banded Chalcedony

The name derives from the recurring chevron or “dog teeth” pattern of the stripes

air bubbles or black carbon deposits

Preservation is enabled by a lack of oxygen

Green Mica 8mm Round A Grade - 15-16 Inch Freeform Cval Petrified Wood Agate is formedMica 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