pinctada maximus, pearl oyster shell
necklace of mother-of-pearl, pearls & austrian crystal
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| composition | calcium carbonate |
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| other accepted names | mop |
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| color | nacre-formed iridescence |
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| color source | from light being refracted within the crystal layers of the shell, as well as diet and genetic factors |
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| significant sources | ocean and river waters of the world |
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| MOH scale | 2.5 |
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| care and treatment | Mother-of-pearl is a soft organic substance which can easily get scratched. Clean with a mild soap. Do not expose to harsh detergents or chemicals. Do not clean in ultra sonic jewelry cleaner. |
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