Chrysocolla Chalcedony Value, Price, and Jewelry Information

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

Chrysocolla Chalcedony

Chrysocolla Chalcedony Information

Data Value
Name Chrysocolla Chalcedony
Is a Variety of Chalcedony
Colors Blue to blue-green.
Crystallography Hexagonal, microcrystalline.
Refractive Index 1.540-1.553
Hardness 7
Wearability Excellent
Fracture Conchoidal, granular
Specific Gravity 2.55-2.91
Birefringence 0.004-0.009
Cleavage None
Dispersion None.
Transparency Opaque.
Pleochroism

None.

Optics

o = 1.540; e = 1.553. Uniaxial (+).

Optic Sign 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