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Gemstone irradiation is a process in which a gemstone is exposed to artificial radiation in order to enhance its optical properties. High levels of ionizing radiation can change the atomic structure of the gemstone's crystal lattice , which in turn alters the optical properties within it. [ 1 ]
Electron-beam processing or electron irradiation (EBI) is a process that involves using electrons, usually of high energy, to treat an object for a variety of purposes. This may take place under elevated temperatures and nitrogen atmosphere.
The irradiation process is widely practiced in jewelry industry [12] and enabled the creation of gemstone colors that do not exist or are extremely rare in nature. [13] However, particularly when done in a nuclear reactor, the processes can make gemstones radioactive. Health risks related to the residual radioactivity of the treated gemstones ...
Irradiated diamonds are all some shade of green, black, or blue after treatment, but most are annealed to further modify their color into bright shades of yellow, orange, brown, or pink. The annealing process increases the mobility of individual carbon atoms, allowing some of the lattice defects created during irradiation to be corrected.
The irradiation process is widely practiced in jewelry industry [45] and enabled the creation of gemstone colors that do not exist or are extremely rare in nature. [46] However, particularly when done in a nuclear reactor , the processes can make gemstones radioactive.
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Jet as a gemstone became fashionable during the reign of Queen Victoria. [46] It originally became fashionable in the 1850s after the queen wore a necklace of it as part of mourning dress for Princess Victoria of Saxe-Coburg and Gotha. [46] Later the Queen wore Whitby jet as part of her mourning dress while mourning the death of Prince Albert.