Labradorite
Feldspar group, Plagioclase series (Labradorite) · Semi-Precious Gemstone and Decorative Stone
Crystal System
Triclinic; typically forms in massive, granular, or tabular habits
Mineral Group
Silicates (Tectosilicates)
Chemical Formula
(Na,Ca)(Al,Si)4O8
Formation Process
Igneous and metamorphic processes, primarily crystallizing slowly from cooling basic magmas like gabbro, basalt, and anorthosite
About This Crystal
A polished pendulum pendant featuring a grayish-green body with mottled dark patches and characteristic iridescent schiller effects or labradorescence under direct lighting. It is opaque to translucent with a vitreous to pearly luster.
Physical Characteristics
Color ranges from gray, green, and brown with multicolored flashes; white streak; good cleavage in two directions at nearly right angles; uneven to conchoidal fracture; specific gravity around 2.70 to 2.74; brittle tenacity
Optical Properties
Biaxial positive with refractive indices between 1.559 and 1.568; exhibits strong labradorescence (schiller effect) due to lamellar intergrowths
Hardness & Durability
Origin Region
Madagascar, Finland, Canada (Labrador), Australia, and Russia; found in mafic igneous rocks
Hardness & Durability
Mohs hardness of 6 to 6.5; moderate toughness but sensitive to sharp blows due to good cleavage; fair wearability for jewelry if protected in settings
Care & Maintenance
Clean with warm soapy water and a soft cloth; avoid ultrasonic cleaners, harsh chemicals, and sudden temperature shocks; store separately to prevent scratching
Rarity & Value
Common to uncommon depending on the intensity of the labradorescence; value increases with vibrant flashes of blue, gold, or multi-color; widely available and affordable as carved pendants
Special Characteristics
Labradorescence, an optical phenomenon caused by light diffraction through microscopic lamellar intergrowths of albite and anorthite
Lore & History
Associated with the Inuit peoples' lore where the Northern Lights were trapped in the rocks of the coast; used in modern crystal healing as a stone of transformation, enhancing intuition, and protecting the aura (traditional beliefs, not scientific claims)