Apache Tear
Obsidian var. Apache Tear · Semi-Precious Gemstone / Mineral Specimen
Crystal System
Amorphous
Mineral Group
Mineraloid
Chemical Formula
SiO2 with varying amounts of H2O, Fe, and Mg
Formation Process
Extrusive igneous process where silica-rich lava cools rapidly with minimal crystal growth, often forming small, rounded nodules (nodular obsidian) within perlitic volcanic ash layers.
About This Crystal
A small, tumbled, dark gray to black nodular stone with a smooth, waxy to vitreous luster and a translucent to opaque appearance. It features a characteristic curved shape with minor surface weathering lines and a small brownish-tan inclusion or fracture matrix.
Physical Characteristics
Color is dark smoky gray to black with a white streak. It exhibits no true cleavage and breaks with a very sharp conchoidal fracture. Specific gravity is approximately 2.35 to 2.45. It is brittle in tenacity and non-magnetic.
Optical Properties
Isotropic (singly refractive) due to its amorphous nature, with a refractive index around 1.48 to 1.51. It does not display pleochroism or other advanced optical phenomena.
Hardness & Durability
Origin Region
United States (specifically Arizona, Nevada, and New Mexico), Mexico
Hardness & Durability
Mohs hardness is 5 to 5.5. It has fair durability, but because of its conchoidal fracture and vulnerability to sharp impacts or sudden temperature changes, care should be taken in jewelry settings.
Care & Maintenance
Clean safely using warm soapy water and a soft cloth. Avoid ultrasonic and steam cleaners, harsh chemicals, and prolonged exposure to direct sunlight or extreme temperature shifts.
Rarity & Value
Common and widely accessible. Value is generally low, making tumbled specimens affordable for collectors and jewelry makers alike. Treatments are virtually non-existent as natural stones are plentiful.
Special Characteristics
Forms as naturally tumbled or rounded small nodules known as volcanic glass spherulites, often found eroding out of perlite beds.
Lore & History
Rooted in Native American folklore of the Apache tribe, legend says these stones represent the crystallized tears of grieving women whose warriors died in battle. In metaphysical traditions, it is often used for grief support, emotional healing, grounding, and protection.