The most expensive pearl ever sold was Marie Antoinette's pendant. It sold for $32 million in a 2018 auction. But what is it that makes pearls so expensive? Marie Antoinette's pearl was part of a ...
The oyster or mussel slowly secretes layers of aragonite and conchiolin, materials that also make up its shell. This creates a material called nacre, also known as mother-of-pearl, which encases the ...
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