Purple & Green Fluorite is a semi-precious gemstone surface — a Semi-precious fluorite gemstone slab — a mosaic of polished, irregularly cut fluorite pieces showing bold purple-and-green mineral banding within each fragment, with visible piece-to-piece seams. A statement decorative​/​backlit surface. slab with a polished finish, often backlit as a feature panel, vanity or bar front. A dramatic decorative stone for interior feature applications.