Lapis Lazuli
Lapis Lazuli (Rock aggregate primarily composed of Lazurite, Calcite, and Pyrite) · Semi-Precious Gemstone and Decorative Stone
Crystal System
Isometric (Cubic) for individual mineral components; massive or granular crystal habit
Mineral Group
Silicate, specifically a feldspathoid group mineral
Chemical Formula
(Na,Ca)8(AlSiO4)6(SO4,S,Cl)2 (Lazurite component)
Formation Process
Metamorphic, formed through contact metamorphism of limestone into skarn
About This Crystal
An opaque, tumbled stone displaying a deep royal blue color with characteristic golden brassy flecks of pyrite and occasional white calcite veins running across the polished surface, exhibiting a smooth, waxy to vitreous luster.
Physical Characteristics
Deep royal blue body color with light blue to white streaks and golden pyrite inclusions; cleavage is poor; fracture is uneven to conchoidal; specific gravity ranges from 2.7 to 2.9; tenacity is brittle
Optical Properties
Isotropic (singly refractive) for lazurite components; refractive index is approximately 1.50 to 1.67; typically non-pleochroic due to aggregate nature
Hardness & Durability
Origin Region
Badakhshan province in Afghanistan, Chile, Russia, and the United States
Hardness & Durability
Mohs hardness of 5 to 5.5; moderate toughness but sensitive to scratching, acids, and thermal shock; fair wearability requiring care in rings
Care & Maintenance
Clean with warm soapy water and a soft cloth; avoid ultrasonic cleaners, steam, harsh chemicals, and prolonged exposure to direct sunlight or sudden temperature changes
Rarity & Value
Common to uncommon depending on grade; higher value is placed on deep uniform blue with minimal white calcite and pleasing distribution of pyrite; price ranges from accessible to moderate
Special Characteristics
Distinctive golden pyrite flecks and white calcite veins creating a starry night appearance; occasional weak orange fluorescence under ultraviolet light
Lore & History
Historically used by ancient civilizations such as the Egyptians, Mesopotamians, and Greeks for amulets, royal adornments, and crushed into ultramarine pigment; associated traditionally with the third eye and throat chakras, promoting wisdom, truth, and inner power