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UDAWATTE, C. P. .; ABEYWEERA, S. .; PERERA, L. R. K. .; ILLANGASINGHE, S. .; WEERASOORIYA, C. .; SUTTHIRAT, C. .; JAYASINGHE, N. .; DHARMARATNE, T. .; DIYABALANAGE, S. . Optimized Conditions for Cobalt Diffusion in Sri Lankan Colorless Topaz and Coloration Mechanism Elucidation through Spectro-Chemical Investigation. J Met Mater Miner 2023, 33, 73-81.