Mineralpedia Details for Cyanotrichite
Cyanotrichite
Named after the Greek words kyanos, meaning “blue,” and tricha, meaning “hair,” in reference to the mineral’s common blue color and hair-like habit. Cyanotrichite is an uncommon mineral that occurs in oxidized copper sulfide deposits in localities in Romania, France, England, Italy, Greece Russia, Kazakhstan, South Africa, the United States, Chile, and quite a few others. Associated minerals include brochantite, spangolite, chalcophyllite, olivenite, tyrolite, parnauite, azurite, and malachite.
Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at http://www.handbookofmineralogy.org/pdfs/cyanotrichite.pdf
- Formula
- Cu4Al2SO4(OH)12·2H2O
- Crystal System
- Orthorhombic
- Crystal Habit
- Druse, Acicular, Spherical
- Cleavage
- Good, None, None
- Luster
- Silky
- Color
- sky blue, light blue, dark blue
- Streak
- pale blue
- Class
- Orthorhombic
- Fracture
- Uneven
- Hardness
- 2
- WebMineral
- View Cyanotrichite
- Mindat
- View Cyanotrichite
Cyanotrichite from Grandview mine, Coconino Co., Arizona, United States
Deep blue acicular, radial sprays to 1mm.
Deep vivid blue radial sprays to 2mm with minor Brochantite.
Click thumbnail images for larger view.
