An approach to understanding the factors in the emerald enhancement clarity grading system used at CDTECGemlab

Performing a literature search is a very important—but often neglected—part of doing gemmologica

Malacacheta, located in Minas Gerais, Brazil, is renowned for its alexandrite deposits and com-plex

The mineral zoisite is a calcium alumosilicate belonging to the class of silicates, more exactly sor