Other gemstones that can exhibit color change include certain sapphires, garnets, and spinels—and yes, even glass can be engineered to mimic this effect. READ: Lola Tung is leading the silk ...

The cause of color in the many hues of other sapphire colors is less well researched: vanadium, grayish blue to green; iron with a missing electron, yellow; iron alone, pale yellow; chromium with ...

Opals have captivated humans for centuries with their mesmerizing play of color and mysterious beauty. In this video, we explore the fascinating world of opals.one of the most stunning and rare ...