Biotite is a Black Mica and known as black Mica. Each piece will offer a unique reflective shimmer. Along with the Mica there are interesting flashings of blue and possibly other color combos in this special obelisk. Biotite acts as a detoxifier and is great for various health reasons. Emotional healing it will help bring out your inner child, clearing clutter, letting go, organization, rebirthing, and transforming. Approximately 3" with sizes, shapes, colors, and inclusions that will vary. From China