Process for the color enhancement of gemstones
OwnerRichard D. Pollakinventor
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Abstract
In accordance with the present invention, there are provided methods for enhancing the color of gemstone(s) by subjecting a combination of a gemstone and at least one finely divided form of a selected treating agent including the element copper to a temperature in the range of about 700° C. up to about 1000° C., for a time period in the range of about 3 hours up to about 600 hours, under conditions suitable to enhance the color of the gemstone, wherein the treating agent consists of a finely divided form of the selected treating agent such as copper metal or copper oxide, and wherein said gemstone is topaz or sapphire and the enhanced color lies in the color spectrum of light yellow to red.
Claims19
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.
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 temperature in the range of about 700° C. up to about 1250° C., for a time period in the range of about 3 hours up to about 600 hours, under conditions suitable to enhance the color of the gemstone, and wherein the treating agent primarily includes a finely divided form of the element copper.
A color enhanced gemstone comprising a gemstone having a color enhancing agent diffused into an outer surface of the gemstone and wherein the gemstone is sapphire or topaz and the enhancing agent is copper metal or copper oxide.
A color enhanced gemstone comprising a gemstone having a surface wherein at least the surface of the gemstone has chemically bonded to a color enhancing agent, and wherein the gemstone is sapphire or topaz and the enhancing agent is copper metal or copper oxide.
Dependencies are inferred from the claim text.