Note to Paragraph (b): It is unfair or deceptive to represent, directly or by implication, that industrial grade diamonds or other non-jewelry quality diamonds are of jewelry quality.
Note to Paragraph (c): Additional guidance about imitation and laboratory-created diamond representations and misuse of the words "real," "genuine," "natural," "precious," "semi-precious," and similar terms is set forth in §§ 23.25 and 23.27 .
16 C.F.R. §23.12