Blue Sapphire vintage Rings: A Simple Definition

https://medium.com/@k4nwmni923/directdiamondjewelry-what-no-one-is-talking-about-6fa75eaa0cc9

The warmth that produces the diamond can even exceed one,200 levels Celsius. Anything at all fewer than 400 levels Celsius leads to graphite, not diamond. Discuss heat. It corresponds to the heat, the enthusiasm