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 ...

while wild-caught pearl lobsters sell for $99 per kilogram. This makes pearl lobsters more than 6 times more expensive than Maine lobsters, which go for $15 a kilogram. So what makes pearl ...