Minerals & Gemstone 480x104
Minerals & Gemstone 480x104
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Glossary of Terms
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Nacre
Substance produced by mollusks and oysters as a coating on their inner shell layer. Nacre is iridescent and causes the mother-of-pearl effect, as well as the iridescence of Pearls. Nacre is also used as a synonym of mother-of-pearl.




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