Synthetic Lab Grown Color change alexandrite is a crystal which has been created by the floating zone method. This method is similar to the pulling (Czochralski method), when the crystal is pulled vertically, but, instead, here it is pulled horizontally, using a tungsten dish and slow-melting technique, where the dish is pulled over a period of time under a heating element.
Chemical composition: BeAl2O4+Fe,Ti,
Color: Green/Blue daylight and fluorescent light
Crystal structure: Orthorhombic,
Refractive Index: 1.746-1.756,