![Pressure Heated Sapphire • Squeezing Sapphire • Corundums treated with high temperatures and low pressure (HT+P) Pressure Heated Sapphire • Squeezing Sapphire • Corundums treated with high temperatures and low pressure (HT+P)](https://lotusgemology.com/images/library/articles/gemologyarticles/pressure-heated-sapphire/punsiri-blue.jpg)
Pressure Heated Sapphire • Squeezing Sapphire • Corundums treated with high temperatures and low pressure (HT+P)
IGL Gem Testing Laboratories - SURFACE DIFFUSION TREATMENT IN SAPPHIRES AND ITS IDENTIFICATION Surface diffusion is an enhancement method in which certain natural elements that cause color, such as CHROMIUM, IRON or
![From the GIA Laboratory: Beryllium in Corundum – The Consequences for Blue Sapphire | Research & News From the GIA Laboratory: Beryllium in Corundum – The Consequences for Blue Sapphire | Research & News](https://www.gia.edu/images/55088_636x358.jpg)