Nan Jiang

Color Depth Gradient in Color-Change Fluorite from Brazil: A Multi-Spectroscopic Study on the Coloration Mechanism

This study investigated twelve gem-quality color-change fluorite specimens exhibiting a purple–blue gradient from Nova Era, Brazil, using colorimetry, Raman spectroscopy, UV-Vis spectroscopy, photoluminescence spectroscopy, EDXRF, and DiamondView imaging to explore the relationsh...