Olivine
Peridot
The only gem found in meteorites.
- Mohs hardness
- 6.5–7
- Crystal system
- Orthorhombic
- Composition
- (Mg,Fe)₂SiO₄
- Colours
- Yellow-green, Olive green, Pure green
- Origins
- Pakistan (Sapat), Myanmar, USA (Arizona)
- Birthstone
- August
Peridot is one of the few gems that occurs in only one colour - its iron content sets the saturation. Fine large gemstones from Pakistan's Sapat mine match the deepest historical Egyptian material.
Olivine has been identified in pallasite meteorites, on Mars and in lunar samples - making peridot a literal extraterrestrial gem.
Mined on Egypt's Zabargad island for over 3,500 years; thought by Cleopatra's court to be 'evening emerald'.
Treatments
What to know
- Generally untreated
Care & handling
How to wear it
- Sensitive to acid and rapid temperature change
- Avoid ultrasonic; warm soapy water and soft cloth
Jewellery use
Setting the gemstone
Best in pendants, earrings and protected ring settings.