gemstone
Peridot
Olivine ((Mg,Fe)2SiO4)
Hardness: 6.5-7 on Mohs scale; Color: Olive green, yellowish-green; Luster: Vitreous (glassy); Crystal Structure: Orthorhombic; Cleavage: Poor; Specific Gravity: 3.2-4.3
- Hardness
- 6
- Color
- Olive green, yellowish-green
- Luster
- Vitreous (glassy)
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Physical properties
Hardness: 6.5-7 on Mohs scale; Color: Olive green, yellowish-green; Luster: Vitreous (glassy); Crystal Structure: Orthorhombic; Cleavage: Poor; Specific Gravity: 3.2-4.3
Formation & geological history
Formed in the Earth's mantle under high-temperature and high-pressure conditions, brought to the surface via volcanic activity or found in meteorites.
Uses & applications
Used primarily in fine jewelry, as a birthstone for August, and by mineral collectors.
Geological facts
Peridot is one of the few gemstones that occurs in only one color (green), and some peridot crystals originate from outer space inside pallasite meteorites.
Field identification & locations
Easily identified by its distinctive olive-green color and conchoidal fracture. Found in locations such as Arizona, Pakistan, Myanmar, and China.
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