Stibnite

Stibnite is a lead-gray antimony sulfide mineral with the formula Sb₂S₃. It is the principal ore of antimony and commonly forms elongated, striated crystals.

Antimony: Antimony is a brittle, silvery-gray metalloid with the chemical symbol Sb and atomic number 51. Stibnite is the main natural source from which antimony is extracted.
Hydrothermal mineral deposit: A hydrothermal mineral deposit forms when heated, mineral-rich water deposits minerals in rock fractures or pores. Many stibnite deposits form from hot fluids circulating through fractures.
Antimony metallurgy: Antimony metallurgy is the extraction and refining of antimony from ores and secondary materials. Stibnite is the leading ore feedstock for this production chain.
Ichinokawa Mine: Ichinokawa Mine is a former antimony mine in Ehime Prefecture, Japan, known for exceptionally large stibnite crystals. Its celebrated specimens reveal how stibnite can grow into unusually massive crystals.
Sulfide mineral: A sulfide mineral is a mineral composed of sulfur combined with one or more metals or semimetals. Stibnite belongs to this mineral class because sulfur is bonded with antimony.
Sulfide mineralization: Sulfide mineralization is the geological concentration of metal-bearing sulfide minerals in rock. It concentrates stibnite where antimony-bearing fluids react with sulfur.
Flame retardant: A flame retardant is a substance or treatment that reduces the ignition or spread of fire in a material. Antimony compounds derived from stibnite are used with halogenated materials to suppress combustion.
Xikuangshan mine: Xikuangshan mine is a major antimony deposit in Hunan, China, and one of the world’s largest antimony-producing districts. Its extensive ore bodies demonstrate the economic importance of stibnite deposits.
Orthorhombic crystal system: The orthorhombic crystal system has three mutually perpendicular axes of unequal length. Stibnite’s crystals belong to this system, helping produce their elongated forms.
Roasting (metallurgy): Roasting is the high-temperature treatment of an ore in air or another controlled atmosphere. Roasting stibnite can convert its sulfide into antimony oxide for further processing.

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GalenaCompared with: It provided a dark cosmetic pigment similar in appearance to powdered galena.