Process for the color enhancement of gemstones

  • US 6,635,309 B2
  • Filed: 03/12/2001
  • Issued: 10/21/2003
  • Est. Priority Date: 03/12/2001
  • Status: Expired due to Fees
First Claim
Patent Images

1. A method for enhancing the color of gemstone(s), the method comprising:

  • subjecting a combination of a gemstone and at least one finely divided form of a selected treating agent to a selected temperature for a selected period of time under conditions suitable to enhance the color of said gemstone; and

    wherein the selected treating agent primarily includes the element copper.

View all claims
    ×
    ×

    Thank you for your feedback

    ×
    ×