• § 23.0 - Scope and application.

• § 23.1 - Deception (general).

• § 23.2 - Misuse of the terms “handmade,” “hand-polished,” etc.

• § 23.3 - Misrepresentation as to gold content.

• § 23.4 - Misuse of the word “vermeil.”

• § 23.5 - Misrepresentation as to silver content.

• § 23.6 - Misuse of the words “platinum,” “iridium,” “palladium,” “ruthenium,” “rhodium,” and “osmium.”

• § 23.7 - Disclosure of surface-layer application of rhodium.

• § 23.8 - Misrepresentation as to products containing more than one precious metal.

• § 23.9 - Misrepresentation as to content of pewter.

• § 23.10 - Additional guidance for the use of quality marks.

• § 23.11 - Misuse of “corrosion proof,” “noncorrosive,” “corrosion resistant,” “rust proof,” “rust resistant,” etc.

• § 23.12 - Definition and misuse of the word “diamond.”

• § 23.13 - Misuse of the words “flawless,” “perfect,” etc.

• § 23.14 - Disclosure of treatments to diamonds.

• § 23.15 - Misuse of the term “blue white.”

• § 23.16 - Misuse of the term “properly cut,” etc.

• § 23.17 - Misuse of the words “brilliant” and “full cut.”

• § 23.18 - Misrepresentation of weight and “total weight.”

• § 23.19 - Definitions of various pearls.

• § 23.20 - Misuse of the word “pearl.”

• § 23.21 - Misuse of terms such as “cultured pearl,” “seed pearl,” “Oriental pearl,” “natura,” “kultured,” “real,” “synthetic,” and regional designations.

• § 23.22 - Misrepresentation as to cultured pearls.

• § 23.23 - Disclosure of treatments to pearls and cultured pearls.

• § 23.24 - Disclosure of treatments to gemstones.

• § 23.25 - Misuse of the words “ruby,” “sapphire,” “emerald,” “topaz,” “stone,” “birthstone,” “gem,” “gemstone,” etc.

• § 23.26 - Misrepresentation as to varietal name.

• § 23.27 - Misuse of the words “real,” “genuine,” “natural,” “precious,” etc.

• § 23.28 - Misuse of the words “flawless,” “perfect,” etc.

• Appendix Appendix to - Appendix to Part 23—Exemptions Recognized in the Assay for Quality of Gold Alloy, Gold Filled, Gold Overlay, Rolled Gold Plate, Silver, and Platinum Industry Products