Lapis Lazuli I is a semi-precious gemstone surface — a Composite slab of deep cobalt-blue lapis lazuli fragments set in a grid with thin gold​/​brass divider lines; white calcite streaks and golden pyrite flecks scatter through the blue stone for a rich, jewel-like decorative surface. slab with a polished finish, often backlit as a feature panel, vanity or bar front. A dramatic decorative stone for interior feature applications.