Roger Weller, geology instructor
wellerr@cochise.edu
copyright 2006-R.Weller
Mineral
Information on:
erythrite
Chemical Group:
arsenate
Chemical Formula:
Co3(AsO4)2.8H2O
Color: crimson-red, peach-red, magenta, gray
Streak: pale version of mineral color Luster:
pearly, adamantine, vitreous
Hardness: 1.5 to 2.5
Specific Gravity: 2.95
Transparency: transparent to sub-translucent
Cleavage: (010) perfect Tenacity: sectile
Crystal Forms: Monoclinic
system
Crystals are prismatic and striated.
Mineral habits: reniform, stellate, encrustation,
granular
Mineral Associations: mineral of secondary origin in cobalt deposits
Identifying Characteristics: brilliant magenta drusy coating on rocks
Uses: cobalt ore
Occurrences: Cobalt, Ontario, Canada
Toxicity: when-swallowed- very high
when inhaled- very high
Additional Information: