A hard, spherical mass that grows within pearl oysters or other bivalve mollusks. It is highly prized as a gem
The earliest record we have of pearls as precious objects are artifacts from Mesopotamia dated to around 2300 B.C.
Tā shuō tā wèi tā mǔqīn mǎile nà kē zhēnzhū.
He said he bought the pearl for his mother.