Mimetite
Mineral Pb5(AsO4)3Cl
Also called Campylite
Take care.
- Contains lead: Wash your hands after handling it, keep it away from children, and don't make dust.
- Contains arsenic: Wash your hands after handling it, don't make dust, and never heat it.
About it
The arsenic twin of pyromorphite, best known as bright yellow-orange balls and barrel-shaped prisms. Famous from Santa Eulalia and Mapimí in Mexico, Tsumeb in Namibia, and Cornwall.
- Type
- Mineral
- Group
- Arsenate, apatite group
- Formula
- Pb5(AsO4)3Cl
- Hardness (Mohs)
- 3.5–4
- Specific gravity
- 7.1–7.24
- Streak
- white
- Lustre
- resinous, adamantine (diamond-like)
- Crystal system
- Hexagonal
- Colours
- yellow, orange, brown, green, white, colourless
- Transparency
- transparent, translucent
- Cleavage and fracture
- poor; uneven to subconchoidal fracture
Typical values: real specimens vary. For more, see mindat.org.