Obsidian
Obsidian is a natural glass formed by the rapid cooling of volcanic activity, and is a mysterious gemstone with a jet-black luster. Since ancient times, it has been used for weapons, ornaments, and ritual tools.
Obsidian characterized by its glossy black color
Basic Information
| Chemical Formula | Mainly SiO2 (natural glass) |
|---|---|
| Classification | Volcanic glass (amorphous) |
| Hardness | 5–5.5 (Mohs scale) |
| Specific Gravity | Approx. 2.3–2.6 |
| Transparency | Opaque |
Characteristics
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Natural glass: Formed by the rapid cooling of volcanic lava.
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Sharp fracture: The cross-section is extremely sharp, and it was used as blades in ancient times.
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Diverse hues: Primarily black, but also exists in silver, iridescent, and speckled patterns.
Origin and Uses
Main Origins
USA
Mexico
Iceland
Japan
Uses
- Jewelry: Rings, pendants, bracelets, etc.
- Healing: Believed to have effects for warding off evil and grounding.
- Crafts: Also used for blades and sculptures.
Note: Please be aware of the sharp edges and handle with sufficient care.