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Aguilarite

Year of discovery: 1891 (San Carlos mine, Mexico), 1955 (Japan)

Locality list: 10 localities of aguilarite

• Ag₄SeS
• [Ag₄][S|Se]^4-

• Class: Acanthite group
• Class: Selenide - Sulfide

• Se => S: Acanthite, Argentite
• Se => Te: Cervelleite

• S => Se: Naumannite

• Color: Light gray
• Tarnish: Dark gray (in the air)
• Streak: Black
• Luster: Metallic
• Diaphaneity: Opaque

• Habit: Pseudododecahedral
• Twin: (-101)

• Cleavage: No
• Hardness: 2.5
• Density: 7.5

• System: Orthorhombic
• Group: 222, P2₁2₁2₁
• Lattice: a=4.3, b=7.1, c=7.7

Etymology: P. Aguilar, owner of the San Carlos mine (Mexico) where this mineral was found.