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New Method for Identification of Blue Topaz—An Application of Cathodoluminescence(CL)
2009
Journal of geography and geology
Blue colored topaz is the most commercialized gemstone worldwide at present. Very rare in nature, most of these topazes are treated by laboratory irradiation with gamma ray, neutron or electron, or in combination with them ever since more than 30 years ago. Knowledge about the origin of the blue color in topazes is not well understood, and a method to identify blue topaz nondestructively is a worldwide problem. In this research, the tested samples were natural blue, colorless topazes and
doi:10.5539/jgg.v1n2p13
fatcat:5o4zwzbtpbgbhao663gk3xqqjy