File:Lipari-Obsidienne_(5).jpg · Wikimedia Commons · See Wikimedia Commons
AI overview
Obsidian is a naturally occurring volcanic glass created when lava from a volcano cools very quickly without forming crystals, resulting in a smooth, glassy igneous rock. Because the lava cools so rapidly, atoms cannot move around enough to form mineral crystals, which is what gives obsidian its distinctive glass-like properties.
AI-generated from the Wikipedia summary — may contain errors.
Key facts
- Mineral.name
- Obsidian
- Mineral.category
- Volcanic glass
- Mineral.boxbgcolor
- dddddd
- Mineral.image
- Lipari-Obsidienne (5).jpg
- Mineral.color
- usually black; sometimes green or brown; rarely yellow, orange, red or blue
- Mineral.fracture
- Conchoidal
- Mineral.mohs
- 5–6
- Mineral.luster
- Vitreous
- Mineral.other
- Texture: Smooth; glassy
- Mineral.opticalprop
- Translucent
- Mineral.gravity
- c. 2.4
via Wikipedia infobox