metamorphic
Lapis Lazuli
Complex silicate rock (lazurite, calcite, pyrite)
AI-generated identification · may be incorrectHardness 5-5.5 on Mohs scale, deep blue color with golden pyrite flecks, vitreous to greasy luster, massive crystal structure.
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Physical properties
Hardness 5-5.5 on Mohs scale, deep blue color with golden pyrite flecks, vitreous to greasy luster, massive crystal structure.
Formation & geological history
Forms via high-grade regional metamorphism of limestone, primarily in hydrothermal contact zones.
Uses & applications
Widely used for jewelry, ornamental carvings, beads, and historically as ultramarine pigment.
Geological facts
Prized since ancient times by Egyptian pharaohs and Mesopotamian civilizations for burial ornaments.
Field identification & locations
Easily identified by its distinct royal blue color and brassy pyrite inclusions. Major deposits are found in Afghanistan, Chile, and Russia.
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