![Lapis Lazuli (polished cabochon) (Lazurite-rich rock (Na8[Al6Si6O24]n(S,Cl,SO4,OH)2)) — metamorphic](https://media.rockidentification.com/e5200ee8-846e-4895-845d-86e9ea164ac5-compressed.jpg)
metamorphic
Lapis Lazuli (polished cabochon)
Lazurite-rich rock (Na8[Al6Si6O24]n(S,Cl,SO4,OH)2)
Hardness: 5-5.5 (Mohs scale), Color: Intense deep blue with possible gold pyrite flecks, Luster: Vitreous to greasy, Structure: Isometric (granular aggregate), Specific Gravity: 2.7-2.9
- Hardness
- 5-5
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Physical properties
Hardness: 5-5.5 (Mohs scale), Color: Intense deep blue with possible gold pyrite flecks, Luster: Vitreous to greasy, Structure: Isometric (granular aggregate), Specific Gravity: 2.7-2.9
Formation & geological history
Formed through the contact metamorphism of limestone or marble; primary deposits are thousands of years old, often found in hydrothermal veins
Uses & applications
Used primarily in jewelry as cabochons, carvings, and beads; historically used as a pigment (ultramarine) and in high-end decorative inlays
Geological facts
Has been mined for over 6,000 years; the most famous source is the Sar-e-Sang mines in Afghanistan. It was highly prized by the ancient Egyptians for funeral masks and amulets
Field identification & locations
Identify by its unique 'Royal Blue' color and characteristic inclusions of gold-colored pyrite or white calcite veins. Commonly found in Afghanistan, Chile, and Russia
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