Geology Home Page
Roger Weller, geology instructor
Chemical Group: silicate
Chemical Formula: CuSiO3.2H2O
Color: green or blue Streak: white
Luster: vitreous or waxy
Hardness: 2 to 4 Specific Gravity:
2 to 2.5
Cleavage: none Fracture: conchoidal
Crystal Forms and Habits:
Crystals are extremely rare and very small
Mineral Associations: commonly found with malachite and tenorite,
sometimes with azurite.
Most of what is called chrysocolla is really chalcedony with chrysocolla.
Chrysocolla also occurs as pseudomorphs after azurite crystals.
Identifying Characteristics: waxy blue surface, often showing desiccation cracks.
Uses: minor ore of copper
If solid enough it becomes a nice gemstone
Miami and Inspiration
Cole Shaft, Bisbee
Toxicity: when-swallowed- low when inhaled- high
Chrysocolla comes from the words
chryso (gold) and kolla (glue); the name is in
reference to a process in which minute specks of gold were attached to jewelry using
powdered chrysocolla and an organic glue. When heated, copper was released
which then formed an alloy with the gold.