About Tetradymite
Bismuth telluride sulfide, typically pale steel-grey and foliated. It's associated with transformation, spiritual connection, and enhancing intuition.
Primary Hues
Pale Steel-Grey, Tin-White, often with a yellowish or blackish tarnish, forms foliated masses or tabular crystals, sectile
Geological & Scientific Details
Tetradymite is classified as a sulfide mineral mineral which typically crystallizes in the trigonal system. Its chemical formula is Bi2Te2S. Common crystal habits include pyramidal prisms, commonly granular, massive to foliated, also bladed.
Key Geological Properties:
- Mineral Category: Sulfide mineral
- Chemical Formula: Bi2Te2S
- IMA Symbol: Ttd[1]
- Crystal System: Trigonal
- Predominant Geological Color: Steel-gray with dull to iridescent tarnish; white in polished section
- Crystal Habit: Pyramidal prisms, commonly granular, massive to foliated, also bladed
- Twinning: Twin planes {0118} and {0115}
- Cleavage: Perfect on {0001}
- Luster: Metallic, splendent on fresh surfaces, dull if tarnished
- Streak: Steel-gray
- Diaphaneity: Opaque