Lapis Lazuli (polished cabochon/sphere)

Physical Properties

Hardness: 5-5.5 (Mohs), Color: Deep blue with gold flecks, Luster: Vitreous to greasy, Crystal structure: Cubic (mineral constituents), Specific gravity: 2.7–2.9

Formation & Geological History

Formed through contact metamorphism of limestone or marble. It is a rock primarily composed of the mineral lazurite, usually with pyrite inclusions and white calcite veining.

Uses & Applications

Primary use is in jewelry (beads, cabochons), ornamental carvings, and historically used to create ultramarine pigment for art.

Geological Facts

It was highly prized in ancient Egypt and Mesopotamia; the funeral mask of Tutankhamun features lapis lazuli inlays for the eyebrows and eyes.

Field Identification & Locations

Identify by its characteristic 'Royal Blue' color and the presence of brassy-gold pyrite flecks. High-quality specimens lack visible white calcite.

Identified on: 4/20/2026

Mode: Standard