There are many methods for improving color and purity, such as heat treatment. Observation of dissolution of inclusions is one of the important indicators by which corundum heat …
Z Song, T Lu, S Tang, J Ke, J Su, B Gao… - The Journal of …, 2016 - academia.edu
Colourless HPHT-grown synthetic diamonds are becoming more common in the marketplace. The authors recently studied 20 samples weighing 0.06–0.67 ct from a …