PEARL
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This is a close-up of a drill-hole in a cultured pearl. If you could see into the pearl, you would see its nucleus—a bead or piece of mollusk tissue that was inserted by a human. - Photo by John I. Koivula/GIA
This is a close-up of a drill-hole in a cultured pearl. If you could see into the pearl, you would see its nucleus—a bead or piece of mollusk tissue that was inserted by a human. - Photo by John I. Koivula/GIA
