Safflorite
Mineral CoAs2
Take care.
- Contains arsenic: Wash your hands after handling it, don't make dust, and never heat it.
About it
Tin-white cobalt arsenide, often as star-shaped twinned crystals, with skutterudite and native silver. Known from Schneeberg, Saxony, and Cobalt, Ontario.
- Type
- Mineral
- Group
- Arsenide, löllingite group
- Formula
- CoAs2
- Hardness (Mohs)
- 4.5–5
- Specific gravity
- 7.1–7.3
- Streak
- greyish black
- Lustre
- metallic
- Crystal system
- Orthorhombic
- Colours
- tin white, dark grey tarnish
- Transparency
- opaque
- Cleavage and fracture
- distinct; uneven fracture
Typical values: real specimens vary. For more, see mindat.org.