Before revision: All neutron- or electron beam-irradiated gemstones must be tested by an NRC-licensee prior to release for sales; however, if treated in a cobalt-60 gamma ray facility they do not become radioactive and thus are not under NRC authority.
After revision: All neutron- or electron beam-irradiated gemstones must be tested by an NRC-licensee prior to release for sales; however, when treated in a cobalt-60 gamma ray facility , gemstones do not become radioactive and thus are not under NRC authority.