mineral

Chrysocolla (on host rock)

Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O (Copper silicate)

AI-generated identification · may be incorrect

Hardness: 2.5-3.5; Color: Cyan, blue-green, or turquoise; Luster: Vitreous to earthy; Crystal structure: Amorphous; Cleavage: None; Specific Gravity: 2.0-2.4

Hardness: 2
Color: Cyan, blue-green, or turquoise
Luster: Vitreous to earthy

Identified May 29, 2026More mineral →

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Physical properties

Hardness: 2.5-3.5; Color: Cyan, blue-green, or turquoise; Luster: Vitreous to earthy; Crystal structure: Amorphous; Cleavage: None; Specific Gravity: 2.0-2.4

Formation & geological history

Secondary mineral formed in the oxidation zones of copper ore bodies. It occurs as precipitates from copper-bearing solutions in fractures and cavities of igneous or metamorphic host rocks.

Uses & applications

Used primarily as a minor ore of copper, as ornamental stone for carvings, and in silver jewelry as a more affordable turquoise alternative.

Geological facts

Chrysocolla is often confused with turquoise but is generally softer. It is sometimes found infused with quartz (called Stellarite or Drusy Chrysocolla), which makes it hard enough for faceted jewelry.

Field identification & locations

Identify by its distinct bright blue-green streaks against a duller host rock. It is often found in arid regions like Arizona, Chile, and the Democratic Republic of Congo near copper mines.