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Stibnite forms metallic lead gray elongated delicate crystals. It is an important source of antimony. In ancient times it was ground into a powder and mixed with fat to be used as the eye makeup called kohl. It was also a component in ancient flash powder.

Stibnite Rough
Stibnite Classification
Common Name Stibnite
Species Stibnite
Stibnite Optical Properties
Transparency Opaque
Refractive Index Over The Limit
Pleochroism None
Stibnite Characteristic Physical Properties
Hardness 2-2
Streak Gray
Luster Dull, Metallic
Stability Poor
Fracture Conchoidal, subconhoidal
Cleavage Perfect, Imperfect
Stibnite Chemistry & Crystallography
Chemical Name Antimony Sulfide
Chemical Formula Sb2S3
Crystal System Orthorhombic
Chemistry Classification Sulfide

Stibnite Colors

  • Gray Stibnite Gray
  • Black Stibnite Black

Alternate Names


Countries of Origin

Romania; Unknown; China; Japan


Soluble in hydrochloric and nitric acid. Do not expose to open flame as it melts at 546ÂșC. It is also very delicate so care must be taken not to damage specimens.

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Tim Matthews


Tim Matthews

Tim Matthews is President and Chief Executive Officer of Jewelry Television® (JTV), as well as a member of the company's Board of Directors. He oversees and leads all aspects of the company's powerful omni-digital retail platform that uniquely specializes in fine jewelry and gemstones. His passion for business and gemstones has led him to become a recognized expert in the field of gemology. He is a life member of the Gemmological Association of Great Britain (Gem-A) and has earned Gem-A's highest degrees, the Gemmology (FGA) and Diamond (DGA) diplomas. He is also a Graduate Gemologist (GG) of the Gemological Institute of America (GIA) and has also completed GIA's Graduate Diplomas in Diamonds, Colored Stones and Pearls. Under his leadership, JTV has become the leader in the sourcing and selling of color gemstones and jewelry.

This page was created on June 27, 2014.

This page was last edited on October 24, 2019.