PERIDOT
Peridot
Olivine
A yellow-green gem whose color relates to iron in its mineral composition, with a characteristic fresh olive hue.
GEM PROFILE
Basic properties
- Mineral or material
- Olivine
- Main chemical composition
- (Mg,Fe)₂SiO₄
- Crystal & structure
- Orthorhombic
Found with mantle-derived rocks and basalt, as crystals or granular masses.
- Typical colors
- Yellowish green to olive green
- Mohs hardness
- 6.5–7
A measure of scratch resistance, distinct from resistance to impact or breakage.
About hardness and durability - Representative sources
Examples of known sources. Determining the origin of an individual stone requires examination and comparison with reference material.
- Common cutting styles
- Faceted ovals, cushions, rounds and other shapes.
Explore cutting styles
LOOK A LITTLE CLOSER
What to observe
Relatively strong birefringence can make the edges of rear facets appear doubled under magnification.
TREATMENT & CARE
Treatments & care
Treatments & identification
Peridot is generally used without treatment, but must still be distinguished from other similarly colored gems and imitations.
Everyday care
Protect it from acids, impacts and sudden temperature changes. Avoid ultrasonic or steam cleaning; use lukewarm water and mild detergent.
Cleaning depends on treatment, inclusions and mounting. If a stone's condition is unknown, ask your jeweler or a gem specialist before cleaning.
READING & REFERENCES
References
Public sources for learning about this gemstone's general properties.
- GIA · Gemological reference
- GIA · Care & Cleaning
- Handbook of Mineralogy · Mineral data (PDF)
- GIA · Gem sources and fundamentals
This dictionary provides general educational information. Values are representative and do not identify or grade an individual stone. Locality examples include historical deposits.
Sources checked: October 19, 2026