ENHANCEMENT CODE D
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AGTA code.
PROPERTIES
Refractive
Index 1.535-1.539
Hardness = 6.5-7 (Moh's
Scale)
Specific Gravity =2.60
Species - Chalcedony
Optic Character - Aggregate.
WARNINGS FOR CARE
Ultrasonic: Safe
Steamer: Safe
Heat: Fair; color change may occur with heat
Chemicals that
harm: Hydrofluoric acid, nitric acid
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Crystal Structure

Crystal system: Hexagonal fibrous aggregates, micro crystalline quartz
MAJOR SOURCES
Brazil, Madagascar,
Uruguay, US |
Birthstones |