metamorphic
Lapis Lazuli (Polished)
Lapis Lazuli (primarily Lazurite: (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)
Hardness: 5-5.5 (Mohs); Color: Deep celestial blue with gold pyrite flecks; Luster: Vitreous to greasy; Crystal Structure: Isometric; Specific Gravity: 2.7-2.9
- Hardness
- 5-5
- Color
- Deep celestial blue with gold pyrite flecks
- Luster
- Vitreous to greasy
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Physical properties
Hardness: 5-5.5 (Mohs); Color: Deep celestial blue with gold pyrite flecks; Luster: Vitreous to greasy; Crystal Structure: Isometric; Specific Gravity: 2.7-2.9
Formation & geological history
Formed through contact metamorphism of limestone or marble, typically in tectonic zones. Common in ancient formations of Middle Precambrian to Mesozoic ages.
Uses & applications
Used primarily in jewelry, ornamental carvings, and historical pigments (ultramarine). A popular gemstone for collectors and metaphysical uses.
Geological facts
Lapis lazuli was used in the funeral mask of Tutankhamun and was prized across the ancient world from Mesopotamia to Egypt as a symbol of royalty and the heavens.
Field identification & locations
Identify by its unique royal blue color combined with metallic gold flecks of pyrite. Commonly found in Afghanistan (Sar-i Sang), Chile, and Russia.
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