Lapis Lazuli
Lapis Lazuli (Rock aggregate containing Lazurite, Calcite, and Pyrite) · Decorative Stone and Semi-Precious Gemstone
Crystal System
Isometric (Cubic) for individual lazurite crystals, but typically occurs as a massive rock aggregate
Mineral Group
Silicate, specifically a feldspathoid group mineral aggregate
Chemical Formula
(Na,Ca)8(AlSiO4)6(SO4,S,Cl)2 (Lazurite principal component)
Formation Process
Metamorphic, specifically contact metamorphism of limestone into skarn
About This Crystal
The specimen is cut and polished into a double-terminated hexagonal-like prism shape, commonly known as a pendulum or talisman wand. It exhibits a deep, rich royal blue color with distinct white patches of calcite and metallic brass-yellow inclusions of pyrite scattered across the surface.
Physical Characteristics
Deep blue body color with white and golden flecks; blue streak; hardness is variable due to mixed composition; poor cleavage; conchoidal to uneven fracture; specific gravity around 2.7 to 2.9; opaque transparency with vitreous to greasy luster.
Optical Properties
Isotropic (lazurite), refractive index around 1.50 to 1.67, typically lacks pleochroism in the main component, but displays striking visual contrast due to the included minerals.
Hardness & Durability
Origin Region
Badakhshan province in Afghanistan, Chile, Russia, and the United States
Hardness & Durability
Mohs hardness of 5 to 5.5, making it relatively soft and susceptible to scratching by harder stones, dust, and steel. Fair toughness but sensitive to acids and excessive heat.
Care & Maintenance
Clean gently with warm, soapy water and a soft cloth. Avoid ultrasonic cleaners, steam cleaners, harsh chemicals, acids, and prolonged exposure to direct sunlight or sudden temperature changes.
Rarity & Value
Common to uncommon, depending on the grade. High-quality material with deep blue color and minimal white calcite or excessive pyrite is more valuable. Often treated with wax or oil to enhance luster and color stability.
Special Characteristics
Contains natural golden pyrite inclusions that sparkle like stars in a night sky, along with white calcite veining, creating a unique matrix appearance.
Lore & History
Historically revered by ancient civilizations including the Egyptians, Mesopotamians, and Greeks, who used it for amulets, scarabs, and powdered ultramarine pigment for master artworks. Associated with the third-eye chakra, representing wisdom, truth, and spiritual awareness in modern metaphysical traditions.