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Petzite

Year of discovery: 1845 (Sacarîmb, Romania), 1902 (Japan)

Locality list: 18 localities of petzite

• Ag₃AuTe₂
• [Ag⁺₃][Au⁺][Te₂]^4-

• Class: Telluride
• Soluble in: HNO₃ (Decompose)

• Te => S: Uytenbogaardtite
• Te => Se: Fischesserite

• Color: Light gray, Black
• Tarnish: Purple
• Streak: Dark gray
• Luster: Metallic
• Diaphanity: Opaque

• Habit: Massive, Fine granular

• Cleavage: No
• Hardness: 2.5
• Density: 8.9

• System: Cubic
• Group: 432, I4₁32
• Lattice: a=10.4

Etymology: W. Petz, who analyzed this mineral for the first time.