Cuprite is a secondary mineral formed by the oxidation of copper sulfide veins. It is commonly found with native copper and malachite, and forms as both transparent red and lustrous, submetallic crystals. Transparent crystals may be faceted if large enough, but specimens are also commonly displayed as a glittering bed of crystals.
- Optical Properties
- Characteristic Physical Properties
- Chemistry & Crystallography
Over The Limit 2.849 Tolerance: (+0.001/-0.0010)
Singly Refractive (SR)
SubAdamantine, Dull, Metallic
Poor, in two directions
Color due to copper. Very broad absorption down to 630nm.
We acknowledge the significant scientific contributions of John S Harris, FGA to the study of gemstone spectra and with deep appreciation to him, acknowledges the use of his images and related notes about gemstones and their spectra in the educational materials on this website.
Countries of Origin
Unknown; Namibia; United States of America; Mexico