RockVault
Clinozoisite

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)

monocliniccommonSilicates

Clinozoisite

Ca2Al3(SiO4)(Si2O7)O(OH)

The image displays well-formed, prismatic crystals of clinozoisite, exhibiting a greenish-brownish hue and a distinct vitreous luster.

Clinozoisite Physical Properties

Mohs Hardness

6

Crystal System

monoclinic

Luster

vitreous

Streak Color

white

Cleavage

Perfect on {001}, good on {100}

Fracture

uneven

Specific Gravity

3.25

Colors

yellowish-green, brownish-green, gray, pink, colorless

Transparency

transparent

Type Locality

Schwarzenstein Mt., Zemmgrund, Ziller valley, North Tyrol, Tyrol, Austria

Mineral Group

Silicates

Uses

collector, scientific research

Associated Minerals

quartz, feldspar, mica, amphibole, garnet, chlorite

Rarity

common

Geological Context

Clinozoisite is a common metamorphic mineral, typically forming in medium-grade regional metamorphic rocks, especially those rich in calcium, such as altered limestones or mafic igneous rocks.