
metamorphic
Lapis Lazuli (Simulated)
Lapis Lazuli (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2
Hardness: 5.5 (Mohs scale), Color: Intense deep blue, Luster: Vitreous to greasy, Crystal structure: Isometric (dodecahedral), Cleavage: None, Specific gravity: 2.7–2.9
- Hardness
- 5
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Physical properties
Hardness: 5.5 (Mohs scale), Color: Intense deep blue, Luster: Vitreous to greasy, Crystal structure: Isometric (dodecahedral), Cleavage: None, Specific gravity: 2.7–2.9
Formation & geological history
Formed in crystalline limestones through contact metamorphism. The blue color primarily comes from the mineral lazurite. Natural specimens range from the Mesozoic era to modern finds.
Uses & applications
Used primarily in jewelry, cabochons, carvings, and historically as the pigment ultramarine for fine arts.
Geological facts
Lapis lazuli was highly prized by ancient Egyptians, who used it for amulets and the funeral mask of Tutankhamun. The finest quality stones are found in the Sar-e-Sang mines in Afghanistan.
Field identification & locations
Identify by its intense 'royal' blue color and the presence of gold-colored pyrite specks or white calcite veins. In the field, it is often found in skarn deposits. This specific item appears to be a resin or glass butterfly simulation for costume jewelry.
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