Mica is mined from the mineral Muscovite, and occurs in multi-layered, bright translucent sheets. Mica imparts a natural translucence to face powders and blushes when used at levels up to 40%.
Through pressure, heat, and sometimes chemical means, other minerals are bonded to mica to create different colors. There is no chemical residue on the finished mica when chemicals are employed in the bonding process. Rebecca's Apothecary only carries Mica that is bonded to other minerals, without artificial ingredients.