Lapis Lazuli (Tumbled Stone)

Physical Properties

Hardness: 5-5.5 on Mohs scale. Color: Deep royal blue with inclusions of gold-colored pyrite and white calcite. Luster: Vitreous to greasy. Crystal structure: Isometric (dodecahedral). Cleavage: Imperfect.

Formation & Geological History

Formed through contact metamorphism where limestone or dolomite is altered by heat from igneous intrusions. It is typically found in marble beds and can range from 60 million to billions of years old depending on the site.

Uses & Applications

Used primarily in jewelry, ornamental carvings, beads, and historically as a pigment (ultramarine) for fine art. Also highly valued in holistic and spiritual practice communities.

Geological Facts

Lapis lazuli was used in the funeral mask of Tutankhamun and was the source of the world's most expensive pigment, ultramarine, until a synthetic version was created in the 19th century.

Field Identification & Locations

Identify in the field by its intense blue streak (if tested on porcelain) and the presence of golden pyrite specks. Found in large quantities in the Sar-e-Sang mines of Afghanistan, and also in Chile, Russia, and Canada.

Identified on: 4/28/2026

Mode: Standard