About Ullmannite
A nickel antimony sulfide, typically steel-grey with a metallic luster. It's associated with strength, transformation, and mental focus. (Antimony content, handle with care).
Primary Hues
Steel-Grey, Silver-White, Tarnishes greyish-black, often forms cubic or octahedral crystals or massive
Geological & Scientific Details
Ullmannite is classified as a sulfide mineral mineral which typically crystallizes in the cubic system. Its chemical formula is NiSbS.
Key Geological Properties:
- Mineral Category: Sulfide mineral
- Chemical Formula: NiSbS
- IMA Symbol: Ull[1]
- Crystal System: Cubic
- Predominant Geological Color: Steel-gray to tin white
- Twinning: Penetration twins about [110]
- Cleavage: Perfect on {001}
- Luster: metallic
- Diaphaneity: Opaque
Associated Minerals
- Willyamite
- Nickeline
- Niccolite
- Gersdorffite
- Breithauptite
- Chalcopyrite
- Siderite