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
Wikidata facts
- Subclass of
- volcanic glass
- Material used
- feldspar
- Image
- A2613-Museum Geologi-Obsidian.jpg
Show 8 more facts
- Commons category
- Obsidian
- mineral fracture
- conchoidal fracture
- Commons gallery
- Obsidian
- topic's main category
- Category:Obsidian
- described by source
- Encyclopædia Britannica 11th edition
- Mohs' hardness
- 5.5
- color
- red
- on focus list of Wikimedia project
- Wikipedia:Vital articles/Level/4
via Wikidata · CC0
Article · 日本語
黒曜石（黒耀石、こくようせき、英: Obsidian）は、火山岩の一種、およびそれを加工した宝石である。岩石名としては黒曜岩（こくようがん）という。英語名の「オブシディアン」は、エチオピアでオブシウス (Obsius) なる人物がこの石を発見した、という、大プリニウスの『博物誌』の記述による。
Abstract from DBpedia / Wikipedia · CC BY-SA
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