Shining light on “480 nm band” diamonds: Gemmological characteristics of an unusual group of diamonds with yellow and red luminescence

The detection of treatments in ruby and sapphire remains a critical aspect and has become an increas

A.Y. Shelementyeva, Y.B. Shelementyev, O.V. Yarapova Download Pdf

Gem-quality sapphires containing ‘exotic’ elements such as Sn, Nb, Zr, Ta, W, are of special int