Connellite
Mineral Cu19Cl4(SO4)(OH)32·3H2O
About it
Deep blue needles and tufts lining cavities in oxidized copper ores. Named for the chemist Arthur Connell; fine sprays come from Bisbee, Arizona, and Cornwall.
- Type
- Mineral
- Group
- Halide
- Formula
- Cu19Cl4(SO4)(OH)32·3H2O
- Hardness (Mohs)
- 3
- Specific gravity
- 3.36–3.41
- Streak
- pale greenish blue
- Lustre
- vitreous (glassy)
- Crystal system
- Hexagonal
- Colours
- deep blue, azure blue
- Transparency
- translucent
- Cleavage and fracture
- none; conchoidal fracture
Typical values: real specimens vary. For more, see mindat.org.