About this stone
Color
BlueBlue-GreenGreenTurquoise
Origin
PeruUSA (Arizona)ChileDemocratic Republic of CongoIsrael
Mohs hardness
2.5–4 (3.5–7 when silicified with quartz)
Treatment categories
NaturalStabilized
Industry-standard treatment
Soft variety often stabilized; silicified chrysocolla (with quartz/chalcedony matrix) requires no treatment
Mineral chemistry
Hydrated copper aluminum silicate (Cu,Al)2H2Si2O5(OH)4·nH2O
Crystal system
Orthorhombic
Stone family
Silicate
Common cuts
RoundFaceted Round
Common sizes
6mm8mm10mm
Care notes
Soft variety can be very fragile (Mohs 2.5); silicified material is durable (Mohs 6–7). Mild soap and soft cloth; avoid ultrasonic and harsh chemicals.
Related stones
Malachite, Azurite, Turquoise, Eilat Stone
Frequently asked questions
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Is chrysocolla stabilized or natural?
Most commercial chrysocolla bead material is stabilized — impregnated with a clear stabilizing resin that hardens the porous stone for cutting, drilling, and durability in jewelry. This is normal for the variety, not a quality concern; pure chrysocolla is too soft (Mohs 2–4) to work as a bead without it. Some chrysocolla is sold natural — typically the harder material that is intergrown with quartz or chalcedony, where the host quartz provides the durability. Treatment status should be disclosed; ask before buying if it isn't specified. -
What's the difference between chrysocolla and turquoise?
Both are copper minerals in the blue-to-blue-green register, but they're different stones. Turquoise is a hydrated copper aluminum phosphate that typically reads as more opaque and uniform in color, often with a distinct spiderweb of dark matrix. Chrysocolla is a hydrated copper silicate with more mottled, blended coloration — blue and green tones flowing into one another, often with black or brown matrix from manganese and iron oxides. Chrysocolla is also generally softer than turquoise unless intergrown with quartz. -
What is gem silica or chrysocolla chalcedony?
Gem silica is the trade name for chrysocolla that is fully enclosed in or intergrown with chalcedony (microcrystalline quartz). The host chalcedony carries the hardness — up to Mohs 7 — while the chrysocolla provides the saturated blue color. The result is a translucent, durable, richly blue material that is the higher end of the chrysocolla market. True gem silica is uncommon; when present in Dakota's catalog, it should be identified. -
How durable is chrysocolla for daily wear?
Depends on the form. Stabilized chrysocolla behaves at roughly Mohs 5–6 — durable enough for necklaces, bracelets, and earrings with reasonable care; ring use is harder on the stone and not generally recommended. Chrysocolla intergrown with quartz (gem-silica-grade material) approaches Mohs 7 and is fully durable for any jewelry application. Pure unstabilized chrysocolla is soft (Mohs 2–4) and should be treated as a delicate stone. Care guidance: soft cloth and mild soap; avoid ultrasonic cleaners and harsh solvents. -
Where does chrysocolla come from?
Chrysocolla is found wherever copper deposits have weathered in oxidizing conditions. Major historical and current sources include the copper belt of Arizona (Inspiration Mine, Globe-Miami district, Ray Mine), New Mexico, Nevada, Peru, the DR Congo, Chile, and Israel (where the mixed chrysocolla-malachite-turquoise material from the Eilat region is sold as Eilat stone). Dakota's active chrysocolla inventory is predominantly USA-sourced with some Peruvian and Chinese material. Origin should be disclosed where the supplier has disclosed it.