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| аметрин (a piece of amethyst is first pre-heated to produce citrine, then partially exposed to beta radiation to regain its purple color. As a result, one part of the gem looks like citrine, the other remains amethyst violet or purple Zamatewski) | |||
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| аметрин (a piece of amethyst is first pre-heated to produce citrine, then partially exposed to beta radiation to regain its purple color. As a result, one part of the gem looks like citrine, the other remains amethyst violet or purple Zamatewski) | |||