Spinel, often overshadowed yet stunningly beautiful, deserves your attention. This mineral boasts a spectrum of vivid colors—red, orange, yellow, green, blue, violet, and purple—known for their exceptional luster and brilliance. With a hardness rating of 8 on the Mohs scale,
The Main Benefits of Heat Treating Rubies and Sapphires Vibrant Color Enhancement: Heat treatment is the key to transforming the color of rubies and sapphires.
There are two primary methods for mining sapphires in Sri Lanka: River/Alluvial Mining: In this method, Shaft and Tunnel Mining: This method involves digging vertical shafts that are 50 to 80 meters deep,