Obsidian Natural Raw Stone
- Regular
- $9.00
- Sale
- $9.00
- Regular
- $25.00
- Unit Price
- per
Obsidian Properties |
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What is Obsidian? |
Black obsidian resembles a solid piece of glass but is actually difficult to confuse with other rocks, especially when it has the distinctive characteristic of a conchoidal fracture. Black obsidian contains quartz porphyry crystals and feldspar crystals that can only be observed under a microscope. |
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Typre |
Volcanic glass |
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Chemical Formula |
Non-uniform mixture 70–75% SiO2, with MgO, Fe3O4 |
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Color |
Deep black or blackish green |
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Optical Properties |
Translucent |
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Luster |
Vitreous. |
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Streak |
White |
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Hardness |
5-6. |
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Fracture |
Conchoidal. |
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Other properties |
Texture: Smooth; glassy. |
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Formation |
Lava flows, dike and sill |
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Origins |
Includes Italy, Mexico, Scotland, the Aeolian Islands, Hekla Volcano, Iceland, Arizona, Colorado, Texas, Utah, and Idaho in the United States, and the Cascade Volcanic Range and its associated lava beds that extend from Northern California to Washington State. |
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