Chrysocolla
Chrysocolla · Semi-Precious Gemstone and Mineral Specimen
Crystal System
Orthorhombic, typically found in massive, botryoidal, or crusting habits
Mineral Group
Silicates, specifically phyllosilicates
Chemical Formula
(Cu,Al)2H2Si2O5(OH)4·nH2O
Formation Process
Secondary mineral formation through the weathering and oxidation of copper-bearing primary minerals in arid to semi-arid environments
About This Crystal
The specimen is a small, polished deep blue-green or teal cabochon displaying a vibrant color and smooth, rounded surface with vitreous to waxy luster, characteristic of a high-grade polished stone.
Physical Characteristics
Color ranges from cyan, turquoise, to deep blue-green; streak is pale green to white; fracture is conchoidal to uneven; specific gravity ranges from 2.0 to 2.4; tenacity is brittle
Optical Properties
Biaxial with variable refractive indices around 1.570 to 1.635; typically translucent to opaque; no notable pleochroism due to microcrystalline aggregate nature
Hardness & Durability
Origin Region
Notable sources include the USA (Arizona), Peru, Russia, Democratic Republic of Congo, and Chile, typically forming in oxidized zones of copper ore bodies
Hardness & Durability
Mohs hardness of 2.5 to 3.5, making it relatively soft and requiring care; low durability for everyday rings unless stabilized
Care & Maintenance
Clean gently with warm soapy water and a soft cloth; avoid ultrasonic cleaners, harsh chemicals, prolonged exposure to direct sunlight, and sudden temperature changes
Rarity & Value
Common to uncommon depending on grade and matrix composition; value depends on color saturation, pattern, and size, with fine polished specimens or those combined with quartz fetching higher prices
Special Characteristics
Often found intimately mixed with quartz, malachite, or azurite, enhancing hardness and durability (such as gem silica or chrysocolla chalcedony)
Lore & History
Historically used by Native American cultures for jewelry and ornamentation, and by ancient civilizations like the Greeks for soldering gold; in modern crystal healing, it is traditionally associated with the throat chakra, communication, and emotional healing