igneous
Gold Sheen Obsidian
Volcanic Glass (SiO2 with inclusions)
Hardness: 5-5.5 Mohs; Color: Black or dark brown with a golden chatoyancy; Luster: Vitreous/glassy; Structure: Amorphous (non-crystalline); Conchoidal fracture; Specific gravity: approx 2.4
- Hardness
- 5-5
- Color
- Black or dark brown with a golden chatoyancy
- Luster
- Vitreous/glassy
Identified More igneous →
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Physical properties
Hardness: 5-5.5 Mohs; Color: Black or dark brown with a golden chatoyancy; Luster: Vitreous/glassy; Structure: Amorphous (non-crystalline); Conchoidal fracture; Specific gravity: approx 2.4
Formation & geological history
Formed from the rapid cooling of silica-rich rhyolitic lava. The golden sheen is caused by tiny bubbles of gas trapped in the cooling glass, oriented along flow layers.
Uses & applications
Used primarily for lapidary arts, jewelry, meditation stones, Feng Shui, and decorative carvings.
Geological facts
Obsidian was used by ancient civilizations to make razor-sharp tools and weapons. Gold sheen obsidian is particularly prized in modern metaphysical circles for its alleged shielding properties.
Field identification & locations
Identify by its glassy texture and the 'schiller' effect (gold glow) visible when tilted under light. Usually found in volcanic regions like Mexico (Jalisco) and the Western USA.
