Process for irradiating gemstones

Details Process for irradiating gemstones Process for irradiating gemstones

1995-02-03

1997-06-10

Berman, Jack I.

Radiant energy

Irradiation of objects or material

Ion or electron beam irradiation

G21K 500

Patent

active

056378785

ABSTRACT:
A method the electron-beam irradiation of gemstones for uniform color enhancement requiring an electron-beam source having a capacity of 500 kW generating energy of between 3 MeV to 50 MeV. The method requires the gemstones to be moved in and out of the electron-beam path with the electron-beam source also being oscillated but in a direction ninety degrees opposed to the gemstones. Cooling means for the gemstones are also required to prevent heat stress cracking. Gemstones such as beryl, diamonds, quartz, sapphires, tourmaline, dark pearls and other minerals are suitable. More particularly the method relates to the treatment of topaz.

REFERENCES:
patent: 4749869 (1988-06-01), Founrier
patent: 5084909 (1992-01-01), Pollak
patent: 5477055 (1995-12-01), Skold et al.

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