Mother of pearl specifications

Abalone molluscs are a primitive group of marine snails of the class Gastropoda, sub-class Prosobranchia, order Archeagastropod, family Haliotidae the largest of all Gastropods.

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Picture 22: Electric microscopical shooting from a cross section showing the abalone mother of pearl. The cold water surrounding New Zealand favours the formation of highly iridescent and colourful pearl-nacre. The clear water and the rich food supply of New Zealand's moderate climate facilitates the intense development of the layers, alternately built up from nacre and conchiolin. Only this alteration causes the expressive lustre and the strong colours. Hardness rating: 3 - 4,5 Specific gravity: 2,6 - 2,8 Fracture: Conchiodal or scaly Refractive index: 1,52 - 1,65 Chemical composition: Calcium carbonate CaCo3 with organics and water

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