Bayldonite
Mineral PbCu3(AsO4)2(OH)2
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
Green resinous crusts and small crystals of lead-copper arsenate, notably fine at Tsumeb in Namibia. Named for John Bayldon; also found in Cornwall.
- Type
- Mineral
- Group
- Arsenate
- Formula
- PbCu3(AsO4)2(OH)2
- Hardness (Mohs)
- 4.5
- Streak
- pale green
- Lustre
- resinous
- Crystal system
- Monoclinic
- Colours
- grass green, yellowish green, apple green
- Transparency
- translucent
- Cleavage and fracture
- none; uneven fracture
Typical values: real specimens vary. For more, see mindat.org.