Mica specimens for sale

Mica is a mineral group known for its distinctive layered silicate structure, which yields perfect basal cleavage and thin, flexible sheets. The sheets often display a pearly to vitreous luster and can be colorless, brown, or shades of gray, green, or black depending on the exact member of the group. Common forms include muscovite and biotite, sometimes presenting chatoyancy or a subtle iridescence in good specimens. In hand specimens, mica typically forms in mica schist or pegmatites, and crystals can be mined in relatively large, flat flakes that separate along the perfect cleavage planes.