What is peridot?
By Jared James · Last updated 21 May 2026
Definition
Peridot is a yellow-green gemstone and the gem-quality variety of olivine, one of the few gemstones that comes in only one colour. Its signature lime to olive green comes from iron within its chemical structure, so unlike sapphires or tourmalines you cannot get peridot in any other hue. It is the birthstone for August and has been mined and valued since antiquity, including on the Egyptian island of Zabargad in the Red Sea. Fine peridot has a vivid, slightly glowing lime-green colour that is immediately recognisable.
Frequently asked questions
- Why does peridot only come in green?
- Peridot's green is caused by iron as an intrinsic part of its mineral structure, not as a trace impurity the way colour forms in most other coloured gems. You cannot have a colourless, blue or red olivine in the peridot variety; the iron and the green are inseparable.
- Is peridot good for everyday jewellery?
- Peridot is reasonably hard but softer than sapphire or ruby, and it can be sensitive to strong acids and rapid temperature changes. It suits earrings, pendants and occasion rings well, though for everyday ring wear it benefits from a protective setting style.
- What is the most valuable colour of peridot?
- The finest and most valuable peridot is a vivid, pure green without a strongly yellow or brownish tint. Stones from Pakistan's Kohistan region and from Myanmar produce some of the most prized, intensely green examples and command a premium.
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