The stone: Silver Sheen Obsidian
- Inner Glow
- Depth
- Radiance
Obsidian with bubbles frozen in alignment — tilt it and a sheet of silver light travels across the face.
- Material
- Volcanic glass with aligned gas bubbles
- Hardness
- Mohs 5–5.5
- Sources
- Mexico
Silver sheen is a natural effect: gas bubbles stretched into parallel layers as the lava cooled and still flowed, so light sweeps across the surface as the stone moves. The cultural record belongs to obsidian itself, which Mesoamerica worked for four thousand years.
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