metamorphic
Lapis Lazuli
Lapis Lazuli (rock composed primarily of lazurite, calcite, and pyrite)
AI-generated identification · may be incorrectHardness: 5-5.5. Color: Deep blue, often with white (calcite) and gold (pyrite) flecks. Luster: Dull to greasy. Structure: Massive.
- Hardness
- 5-5
- Luster
- Dull to greasy
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Physical properties
Hardness: 5-5.5. Color: Deep blue, often with white (calcite) and gold (pyrite) flecks. Luster: Dull to greasy. Structure: Massive.
Formation & geological history
Formed by contact metamorphism of limestones. Mined predominantly in Afghanistan, with other deposits in Chile, Russia, and the USA.
Uses & applications
Used historically as a pigment (ultramarine), and currently in jewelry, carvings, and as a collector's specimen.
Geological facts
Lapis lazuli was highly prized by the ancient Egyptians and was used in the burial mask of Tutankhamun.
Field identification & locations
Identified by its rich blue color and the presence of pyrite inclusions. Commonly found in contact metamorphic zones.
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