Pearl Law and Legal Definition

According to 16 CFR 23.18 [Title 16 Commercial Practices; Chapter I Federal Trade Commission; Subchapter B Guides and Trade Practice Rules; Part 23 Guides for the Jewelry, Precious Metals, and Pewter Industries] pearl means "a calcareous concretion consisting essentially of alternating concentric layers of carbonate of lime and organic material formed within the body of certain mollusks, the result of an abnormal secretory process caused by an irritation of the mantle of the mollusk following the intrusion of some foreign body inside the shell of the mollusk, or due to some abnormal physiological condition in the mollusk, neither of which has in any way been caused or induced by humans."