RockVault
Smithsonite

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)

trigonaluncommonCarbonates

Smithsonite

ZnCO3

This image displays a beautiful botryoidal (grape-like) aggregate of pink smithsonite, specifically a cobaltoan variety, exhibiting a soft, waxy to vitreous luster.

Smithsonite Physical Properties

Mohs Hardness

4

Crystal System

trigonal

Luster

vitreous

Streak Color

white

Cleavage

perfect rhombohedral on {1011}

Fracture

uneven

Specific Gravity

4.35

Colors

pink, blue, green, yellow, brown, gray, white, colorless

Transparency

translucent

Type Locality

Refugio Mine, Guadalupe de Los Reyes, Municipio de Cosalá, Sinaloa, Mexico

Mineral Group

Carbonates

Uses

collector, gemstone, zinc_ore

Associated Minerals

hemimorphite, cerussite, anglesite, malachite, azurite, calcite, limonite

Rarity

uncommon

Geological Context

Smithsonite is a secondary mineral that forms in the oxidized zone of zinc-bearing ore deposits, typically as an alteration product of primary zinc sulfides like sphalerite, often in limestone environments.