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Stibnite

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)

orthorhombicuncommonSulfides

Stibnite

Sb2S3

The image displays a cluster of elongated, needle-like to prismatic crystals of stibnite, exhibiting a distinct metallic lead-gray luster. The crystals are arranged in a radiating or parallel aggregate, showcasing their characteristic striations.

Stibnite Physical Properties

Mohs Hardness

2

Crystal System

orthorhombic

Luster

metallic

Streak Color

lead gray to black

Cleavage

Perfect on {010}

Fracture

uneven

Specific Gravity

4.52

Colors

lead-gray, steel-gray, black

Transparency

opaque

Type Locality

Baia Mare (Nagybánya), Maramures County, Romania

Mineral Group

Sulfides

Uses

ore of antimony, collector's specimens

Associated Minerals

quartz, calcite, barite, cinnabar, galena, pyrite

Rarity

uncommon

Geological Context

Stibnite typically forms in low-temperature hydrothermal veins, often associated with hot springs and volcanic deposits. It is the most important ore mineral of antimony, found in various geological settings worldwide.