Chrysocolla Chalcedony Value, Price, and Jewelry Information

chrysocolla chalcedony - Arizona
“Chrysocolla in Quartz (Gem Silica),” Live Oak Pit, Inspiration Mine, Gila County, Arizona, USA. © Rob Lavinsky, Used with permission.

Chrysocolla Chalcedony Value

The International Gem Society (IGS) has a list of businesses offering gemstone appraisal services.

Chrysocolla Chalcedony Information

NameChrysocolla Chalcedony
Is a Variety ofChalcedony
Crystallography Hexagonal, microcrystalline.
Refractive Index 1.540-1.553
Colors Blue to blue-green.
Fracture Conchoidal, granular
Hardness 7
Specific Gravity 2.55-2.91
Birefringence 0.004-0.009
Cleavage None
Dispersion None.
Wearability Excellent
Transparency Opaque.
Pleochroism None.
Optics o = 1.540; e = 1.553. Uniaxial (+).

Marketed as “Gem Silica” this relatively rare, blue to blue-green, opaque to near transparent material is the most expensive type of chalcedony. Found almost exclusively in Arizona its color is due to copper. Those who take the trouble to seek it out and are willing to pay the price are rewarded with a glorious color, (elsewhere found only in the soft gem Chrysocolla,) in a stone that has the durability and hardness of quartz.

chrysocolla chalcedony - gem silica