RockVault
Peridot

Image: <bdi><a href="https://www.wikidata.org/wiki/Q56247090" class="extiw" title="d:Q56247090"><span title="mineral collector and dealer">Robert M. Lavinsky</span></a></bdi> (CC BY-SA 3.0)

orthorhombiccommonSilicates

Peridot

(Mg,Fe)2SiO4

A vibrant olive-green peridot crystal, a variety of forsterite, featuring distinctive acicular inclusions of the rare mineral ludwigite.

Peridot Physical Properties

Mohs Hardness

6.5

Crystal System

orthorhombic

Luster

vitreous

Streak Color

white

Cleavage

poor to distinct on {010} and {100}

Fracture

conchoidal

Specific Gravity

3.34

Colors

olive green, yellowish-green, brownish-green

Transparency

transparent

Type Locality

Suppat, Kohistan, Pakistan

Mineral Group

Silicates

Uses

jewelry, collector

Associated Minerals

ludwigite

Rarity

common

Geological Context

Peridot forms in mafic and ultramafic igneous rocks such as basalt, peridotite, and dunite, crystallizing from magma deep within the Earth's mantle. It can also be found in some metamorphic rocks and pallasite meteorites.