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

Jade or "Fei Cui" are trade names for a stone that typi- cally contains only one or more main minera

Larimar, a massive blue variety of the mineral pectolite, belonging to the wollastonite group of min

Corundum, encompassing the highly prized ruby and sapphire varieties, stands as a cornerstone of the