Luzonite
Mineral Cu3AsS4
Take care.
- Contains arsenic: Wash your hands after handling it, don't make dust, and never heat it.
About it
The tetragonal form of copper arsenic sulfide, pinkish grey and usually massive with enargite. Named for Luzon, Philippines; also from Chinkuashih, Taiwan.
- Type
- Mineral
- Group
- Sulfosalt
- Formula
- Cu3AsS4
- Hardness (Mohs)
- 3.5
- Specific gravity
- 4.3–4.6
- Streak
- black
- Lustre
- metallic
- Crystal system
- Tetragonal
- Colours
- pinkish brown, dark grey with a pinkish tint
- Transparency
- opaque
- Cleavage and fracture
- indistinct; uneven fracture
Typical values: real specimens vary. For more, see mindat.org.