Sylvanite
ID: 76
Sylvanite
Chemical Formula
AgAuTe₄
Hardness (Mohs)
1.5 - 2
Crystal System
Monoclinic
Streak
Gray
Luster
Metallic
Diaphaneity
Opaque
Color
Silver-white to steel-gray, sometimes with a yellowish tint.
Crystal Habit / Mode of Occurrence
Typically prismatic crystals, often elongated and sometimes bladed. Can also be found as granular or massive aggregates. Often occurs in association with other telluride minerals and gold.
Fun Facts
Sylvanite is a telluride mineral, meaning it contains the element tellurium. It's also interesting because it's a relatively rare mineral that contains both silver and gold as essential components in its chemical formula.