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Kermesite

Year of discovery: 1843 (Neue Hoffnung Gottes mine, Germany), 1916 (Japan)

Locality list: 19 localities of kermesite

• Sb₂S₂O
• [Sb³⁺₂][S₂|O]^6-

• Class: Oxide - Sulfide

• Color: Red
• Streak: Reddish brown
• Luster: Adamantine
• Diaphaneity: Translucent-Opaque

• Habit: Acicular elongated to [010]
• Aggregate: Columnar, Radial

• Cleavage: Perfect on {100} (1 plane)
• Hardness: 1-1.5
• Density: 4.6

• System: Triclinic
• Group: (-1), P(-1)
• Lattice: a=10.8, b=4.1, c=10.3, α=90.0, β=101.5, γ=90.0

Etymology: Kermes after qurmizq (crimson) in Persian after its color.