Process for providing identification markings for gemstones

Details Process for providing identification markings for gemstones Process for providing identification markings for gemstones

1977-11-08

1980-04-29

Williams, Howard S.

Chemistry: electrical and wave energy

Processes and products

Processes of treating materials by wave energy

B01J 110

Patent

active

042005060

ABSTRACT:
A method of providing permanent identification markings to gemstones such as diamond crystals by irradiating the gemstone with protons in the desired pattern. The proton bombardment results in a reaction converting the bombarded area into a different crystal lattice than that of the pre-irradiated stone.

REFERENCES:
patent: 2945793 (1960-07-01), Dugdale
patent: 2998365 (1961-08-01), Custers et al.
patent: 3657085 (1972-04-01), Hoffmeister et al.

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