Source: New Zealand, Australia, Japan and United States. Shells from small sea creatures of the abalone family. Most popular is “rainbow abalone” as seen above.
Chemical: Calcium Carbonate
Formation: Shells of the abalone
Crystal System: None. Organic
Unusual Properties: Can produce abalone pearls but these are rare.
Wearability: Excellent for jewelry items.
Optic Character: None
Absorption Spectra: None
Specific Gravity: Varies
Transparency: Opaque to translucent
Special Identifying Properties and Tests: Abalone shell jewelry is rather unique for the intensity of colors that offers more variety of colors that ordinary mother-of-pearl.
Imitations: None known.