N.J. Stat. § 51:5-1
No person shall make for sale or sell, or offer to sell or dispose of, or have in his possession with intent to sell or dispose of, any article of merchandise made in whole or in part of gold or any alloy of gold, upon which article, or upon any tag, card or label attached thereto, or upon any box, package, cover or wrapper in which such article is incased or inclosed, shall be stamped, branded, engraved or imprinted any mark indicating, or designed or intended to indicate that the gold or alloy of gold in such article is of a greater degree of fineness than the actual fineness or quality of such gold or alloy, unless the actual fineness of such gold or alloy in the case of flat ware and watch cases be not less by more than three one-thousandths parts, and in the case of all other articles be not less by more than one-half karat than the fineness indicated by any such mark, according to the standards and subject to the qualifications set forth in section 51:5-2 of this title.
N.J.S. § 51:5-1