Apache Tear
Obsidian var. Apache Tear · Semi-Precious Gemstone / Mineral Specimen
Crystal System
Amorphous (Non-crystalline mineraloid)
Mineral Group
Mineraloid (Silicate-based glass)
Chemical Formula
SiO2 with varying amounts of H2O, Fe, and Mg
Formation Process
Extrusive Igneous (rapidly cooling felsic lava, often as small nodular perlite cores)
About This Crystal
Small, rounded, pebble-like tumbled stone with a dark smoky-brown to opaque black appearance, possessing a smooth vitreous to sub-vitreous luster and translucent edges when held to strong light.
Physical Characteristics
Color is deep black to dark brown; streak is white; no cleavage; fracture is distinctly conchoidal; specific gravity is approximately 2.35 to 2.45; tenacity is brittle.
Optical Properties
Isotropic (singly refractive due to amorphous structure); refractive index is around 1.48 to 1.51; exhibits no pleochroism.
Hardness & Durability
Origin Region
Superior, Arizona, USA, and other volcanic regions worldwide
Hardness & Durability
Mohs hardness of 5 to 5.5; moderate toughness but brittle due to conchoidal fracture; sensitive to sharp impacts.
Care & Maintenance
Clean with warm soapy water and a soft cloth; avoid harsh chemicals and ultrasonic cleaners; store separately from harder minerals to prevent scratching.
Rarity & Value
Common; widely available at low cost, primarily valued as a polished pocket stone or specimen.
Special Characteristics
Natural rounded nodule (Apache tear) found within perlite deposits; translucent when backlit with smoky brown tones.
Lore & History
Associated with comfort during times of grief, emotional healing, and protection in traditional crystal lore; named after a legendary tale of Apache warriors and mourning women.