RockVault
Benitoite

Image: <bdi><a href="https://www.wikidata.org/wiki/Q126871365" class="extiw" title="d:Q126871365"><span title="photographer from the United States">Shannon Heinle</span></a></bdi> (CC0)

hexagonalcommonSilicates

Benitoite

BaTiSi3O9

This sample features vibrant blue benitoite crystals embedded in a white matrix of natrolite, showcasing its characteristic hexagonal (ditrigonal-dipyramidal) crystal form.

Benitoite Physical Properties

Mohs Hardness

6.5

Crystal System

hexagonal

Luster

vitreous

Streak Color

white

Cleavage

distinct on {10-11}

Fracture

conchoidal

Specific Gravity

3.65

Colors

blue, colorless, pink

Transparency

transparent

Type Locality

San Benito County, California, USA

Mineral Group

Silicates

Uses

jewelry, collector

Associated Minerals

natrolite, neptunite, joaquinite

Rarity

common

Geological Context

Benitoite is an extremely rare mineral that forms in hydrothermally altered serpentinite, typically found in natrolite veins, often in association with neptunite and joaquinite.