RockVault
Serpentine

Image: <bdi><a href="https://www.wikidata.org/wiki/Q126871368" class="extiw" title="d:Q126871368"><span title="photographer from the United States">Darla Sondrol</span></a></bdi> (CC0)

monocliniccommonSilicates

Serpentine

(Mg,Fe)3Si2O5(OH)4

The image displays small amounts of green serpentine, appearing massive or fine-grained, associated with a larger brown altered titanium-rich clinohumite specimen.

Serpentine Physical Properties

Mohs Hardness

2.5

Crystal System

monoclinic

Luster

vitreous

Streak Color

white

Cleavage

poor to none

Fracture

conchoidal

Specific Gravity

2.55

Colors

green, yellowish-green, brownish-green, blackish-green

Transparency

translucent

Type Locality

Widespread, including Italy (as per metadata)

Mineral Group

Silicates

Uses

ornamental stone, carving, architectural stone

Associated Minerals

humite, talc, magnesite, chromite, magnetite

Rarity

common

Geological Context

Serpentine forms through the hydrothermal alteration (serpentinization) of ultramafic rocks like peridotite and dunite, and some mafic rocks. It is characteristic of metamorphic environments, particularly in ophiolite complexes and subduction zones.