Producing a 3 to 5 millimeter nacreous pearl through ... For instance, black-lipped oysters are known for producing the black, gray, and purple shades of Tahitian pearls, while gold-lip oysters ...

with an 18-karat gold clasp ... them to grow inside the golden-lipped, saltwater oyster Pinctada Maxima. (Some are also grown in Japanese and Australian pearl farms.) “The value of the golden ...