Laws of New York (Last Updated: November 21, 2014)

Section 229-J. Sale of artificially colored diamonds

Latest version.

Any person, firm,
  corporation or association, and any agent or employee  thereof,  who  or
  which  shall  knowingly  sell  or offer for sale any diamond which shall
  have been  artificially  colored  or  tinted  by  coating,  irradiating,
  heating,  nuclear  bombardment or by any other means, without disclosing
  in writing to the purchaser, or prospective purchaser, that such diamond
  has been artificially  colored  or  tinted,  or  without  disclosing  in
  writing  that  the artificial coloring or tinting of such diamond is not
  permanent, if that be the fact, shall be guilty of a misdemeanor.

                    
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