mineral
Chrysocolla
Hydrated copper phyllosilicate, (Cu,Al)2H2Si2O5(OH)4·nH2O
Hardness: 2.5 to 3.5 on the Mohs scale; Color: Cyan, blue, green, and brown; Luster: Vitreous to earthy; Crystal system: Orthorhombic / amorphous; Cleavage: None
- Hardness
- 2
- Color
- Cyan, blue, green, and brown
- Luster
- Vitreous to earthy
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Physical properties
Hardness: 2.5 to 3.5 on the Mohs scale; Color: Cyan, blue, green, and brown; Luster: Vitreous to earthy; Crystal system: Orthorhombic / amorphous; Cleavage: None
Formation & geological history
Forms in the oxidation zones of copper ore bodies, typically as secondary mineral encrustations, vein fillings, or rounded masses in arid to semi-arid environments.
Uses & applications
Popularly used as an ornamental stone, in lapidary arts, for beaded and cabochon jewelry, and as a collector's specimen.
Geological facts
Chrysocolla is often confused with turquoise due to its striking blue-green color, but it is significantly softer and forms in association with other copper minerals like malachite and azurite.
Field identification & locations
Can be identified by its vibrant teal or cyan color combined with a low hardness and association with copper deposits. Found globally, notably in the USA, Russia, Chile, and the Democratic Republic of the Congo.
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Soil with Mineral Detritus and Quartz Fragments
Regolith / Silicate Mineral Aggregate
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Limonite / Goethite (Iron Ore Mineral nodule)
FeO(OH)·nH2O / FeO(OH)
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Septarian Pebble
Septarian nodule / Concretion
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Schist
Schist
Metamorphic
Potassium Feldspar (Orthoclase)
Orthoclase (KAlSi3O8)
mineral