What is a natural pearl, and how are they formed? Natural pearls form when some kind of irritant, usually a small organism, makes its way into the shell of a mollusk like an oyster or a mussel.
Pearl farmers insert a piece of mollusk tissue, which is called donor tissue, into the shell of the oyster where they want ... the perfect pearl is an art, and the fact remains they're grown ...
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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