Obsidian Tower
- Regular
- $9.00
- Sale
- $9.00
- Regular
- $22.00
- 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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Type |
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. |
Every day, we see nature deteriorating at an alarming rate. The climate is changing faster than ever before, with serious consequences for all life on Earth – including us! Wanting to help, we created Roe Garden to help conserve and restore biodiversity, the web of life that supports all on Earth. By donating 10% of our profits to WWF, we’re able to make a real difference in the fight against climate change and its effects on our planet. What we didn’t know was just how much our little garden would grow. But we’re not giving up without a fight. With your help, we can make a difference!