gemstone
Chrysocolla in Quartz
Chrysocolla (Cu,Al)2H2Si2O5(OH)4·nH2O in Quartz (SiO2)
Hardness: 6.5-7 (due to quartz), Color: Cyan, blue-green, varied with clear/milky quartz, Luster: Vitreous, Crystal structure: Amorphous to microcrystalline (chrysocolla) in trigonal (quartz)
- Hardness
- 6
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Physical properties
Hardness: 6.5-7 (due to quartz), Color: Cyan, blue-green, varied with clear/milky quartz, Luster: Vitreous, Crystal structure: Amorphous to microcrystalline (chrysocolla) in trigonal (quartz)
Formation & geological history
Forms in the oxidation zones of copper ore bodies where silica-rich fluids permeate and solidify, trapping the copper minerals.
Uses & applications
Commonly used in lapidary work and jewelry making due to its striking color and increased durability when mixed with quartz.
Geological facts
Also known sometimes as Gem Silica if it is highly translucent and intensely colored, which is the most valuable variety of chrysocolla.
Field identification & locations
Identified by its distinctive bluish-green color within a harder quartz matrix, often showing veining or mottled patterns. Found in copper mining regions like Arizona, Peru, and Chile.
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