Differentiation of Natural and Irradiated Blue Topaz by Cathodoluminescence(CL) Properties

摘要

Blue colored topaz is one of the most recognized gemstones worldwide.However,it is rarely found in the field and the products have been made mostly in laboratory using gamma,neutron and electron irradiation or combinations of these devices.Origin of the blue color in topaz remains not well understood, largely due to a lack of nondestructive way in idnetifying the blue topaz.Here we report a compari-