Mother-of-pearl is the hard, silvery, internal layer of several kinds of shells, especially oysters, the large varieties of which in the Indian Seas secrete this coat of sufficient thickness to ...
To protect itself, the oyster will coat the unwelcome visitor with layers of nacre (mother-of-pearl) until the gem is formed. Julius Caesar's desire to get his hands on our freshwater pearls is ...
Mother-of-pearl, the iridescent coating inside oyster ... unlike the then less sophisticated frontier Americans, knew the rarity and value of large, round, lustrous pearls. Many of the best ...
As one of the highest clouds in our atmosphere, they form in very cold conditions and with their shimmering colours they are often referred to as "mother-of-pearl". One BBC Weather Watcher said ...
By secreting layers of aragonite and conchiolin, the same substances that are in its calcium carbonate shell, the mollusc creates a material called nacre, commonly known as mother-of-pearl. The oyster ...
GIA 使用对珍珠进行 70 年独创研究后确立的一套综合标准,即 GIA 珍珠价值七要素 (GIA 7 Pearl Value Factors™),这七项要素分别为尺寸、形状、颜色、光泽、表面品质、珍珠层品质和匹配性。 GIA 珍珠价值七要素 (GIA 7 Pearl Value Factors™) 提供了对各类珍珠进行评鉴的 ...
Cast from 18-karat gold, these striking earrings are set with fan-shaped mother of pearl and dotted with 0.07 carats of diamonds. The pearl inlays are designed to symbolise the curved marble ...