[Code of Federal Regulations] [Title 16, Volume 1] [Revised as of January 1, 2005] From the U.S. Government Printing Office via GPO Access [CITE: 16CFR23.13] [Page 148-149] TITLE 16--COMMERCIAL PRACTICES CHAPTER I--FEDERAL TRADE COMMISSION PART 23_GUIDES FOR THE JEWELRY, PRECIOUS METALS, AND PEWTER INDUSTRIES --Table of Contents Sec. 23.13 Disclosure of treatments to diamonds A diamond is a gemstone product. Treatments to diamonds should be disclosed in the manner prescribed in [[Page 149]] Sec. 23.22 of these guides, Disclosure of treatments to gemstones. [65 FR 78743, Dec. 15, 2000]