Chalcedony Facts

Chalcedony Facts


Chalcedony  Physical Properties

Chemical CompositionThe chemical composition is Silicon dioxide and the chemical formula is SiO2.
ColoursVaried colours.
HardnessVaries between 6.5 – 7 Mohs.
Refractive Index1.543  – 1.554
Specific Gravity2.65 – 2.67
LusterWaxy to dull.
Solid StateOpaque to translucent. Few varieties can be transparent too.
Crystal SystemTetrahedral crystal system.
Heat SensitiveNo
SourceWorldwide occurrence. Main producers are United States and Brazil.
EnhancementNot enhanced.
PrecautionsOnly general gemstone precautions required.

NOTE – These properties are largely for the Chalcedony as a group name. It is common to almost all the varieties. However, few exceptions would always be present.

Share On Facebook
Share On Twitter
Share On Google Plus
Share On Linkedin
Share On Pinterest
Contact us
Interest Items: