Gold Sheen Obsidian
Volcanic glass (amorphous SiO2) with aligned microscopic inclusions
A black obsidian displaying a golden metallic sheen caused by light reflecting off aligned microscopic gas bubbles or mineral inclusions.
- Mohs hardness
- 5-5.5
- Color
- black with a golden shimmer or sheen across the surface
- Type
- igneous
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Overview
Gold Sheen Obsidian is a variety of obsidian (natural volcanic glass) that appears black but flashes a shimmering golden sheen when light strikes it at the right angle. The effect is caused by layers of microscopic gas bubbles or mineral inclusions aligned within the glass.
When rotated under light, the golden sheen sweeps across the polished surface, making it a striking decorative and carving material. It is closely related to silver sheen and rainbow sheen obsidian, which show different colored reflections.
Like all obsidian it is amorphous, with conchoidal fracture and a glassy luster.
Formation & geology
Gold Sheen Obsidian forms when silica-rich felsic lava cools so rapidly that crystals cannot grow, freezing into glass. During this rapid solidification, tiny gas bubbles or microscopic crystalline inclusions become trapped and aligned in parallel layers as the viscous lava flowed.
Light entering the polished glass reflects off these aligned microns-thin layers, producing the golden sheen, a form of the optical effect called schiller. The orientation of the inclusions determines the sheen color. It is sourced mainly from volcanic regions of Mexico.
How to identify it
Identify Gold Sheen Obsidian by its black, glassy body that reveals a golden shimmer sweeping across the surface as you tilt it under light. Without that angle it looks like ordinary black obsidian. Hardness is about 5-5.5.
It shows conchoidal fracture, a white streak, and a smooth glassy feel. The sheen is internal and directional, not a surface coating.
Distinguish it from goldstone (man-made glass with sparkly copper flecks, not a flowing sheen) and from pyrite-bearing stones (metallic crystals, not glass). Genuine gold sheen is a soft, moving glow rather than glitter.
Uses & significance
Gold Sheen Obsidian is prized for cabochons, beads, carved figurines, spheres, and decorative objects that display its golden flash. Its uniform glass takes a high polish, ideal for showcasing the sheen.
It is widely used in jewelry such as pendants and rings, where the moving golden glow is the main attraction.
Metaphysically obsidian is regarded as a protective, grounding stone, with gold sheen associated with insight and clearing, though these claims are not scientifically supported.
Frequently asked questions
What causes the golden sheen?
Light reflects off layers of microscopic aligned gas bubbles or inclusions trapped in the glass, producing a directional golden shimmer.
Is Gold Sheen Obsidian natural?
Yes. It is natural volcanic glass; the sheen is a genuine optical effect, unlike man-made goldstone, which contains copper glitter.
How is it different from goldstone?
Goldstone is manufactured glass with sparkling copper flecks, while gold sheen obsidian is natural and shows a smooth, sweeping glow.
How do I see the sheen?
Hold the polished stone under a single light source and tilt it; the golden sheen will sweep across the surface.
Gold Sheen Obsidian guides
In-depth guides for identifying, valuing, and understanding Gold Sheen Obsidian.
Gold Sheen Obsidian identified by the community
Real specimens identified with Rock Identifier.
