![Lapis Lazuli (Lapis Lazuli (Rock containing Lazurite, Na8[AlSi O4]6[S,Cl,SO4,OH]2)) — metamorphic](https://media.rockidentification.com/e8d9bda9-6892-410b-b442-a1010cc5a252-compressed.jpg)
metamorphic
Lapis Lazuli
Lapis Lazuli (Rock containing Lazurite, Na8[AlSi O4]6[S,Cl,SO4,OH]2)
Hardness: 5 to 5.5 (Mohs scale), Color: Deep blue to violet-blue, Luster: Vitreous to greasy, Crystal structure: Isometric (Lazurite component), Cleavage: Indistinct, Specific Gravity: 2.7 to 2.9
- Hardness
- 5 to 5
Identified More metamorphic →
Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Hardness: 5 to 5.5 (Mohs scale), Color: Deep blue to violet-blue, Luster: Vitreous to greasy, Crystal structure: Isometric (Lazurite component), Cleavage: Indistinct, Specific Gravity: 2.7 to 2.9
Formation & geological history
Formed through contact metamorphism, primarily in crystalline limestones. The blue color comes from the mineral lazurite. It has been mined for over 6,000 years, notably in the Sar-e-Sang mines in Afghanistan.
Uses & applications
Used in gemstone jewelry (cabochons and beads), decorative carvings, high-end tiling, and historically as a pigment (Ultramarine blue) for fine arts painting.
Geological facts
In ancient Egypt, it was a favorite stone for amulets and ornaments, including the burial mask of Tutankhamun. Michelangelo used pulverized lapis to paint the ceiling of the Sistine Chapel.
Field identification & locations
Identify by its 'royal blue' color often accompanied by gold-colored pyrite specks (flecks) and white calcite veins. Commonly found in Afghanistan, Chile, Russia, and Myanmar.
More like this
