Beryl
Beryl is a hard transparent and durable mineral. The main four varieties include aquamarine, heliodor, morganite and emerald. Beryl is found in South Africa, Zimbabwe, Namibia, and Swaziland. The colour spectrum ranges from Colorless to, green, blue, yellow, white, pink, etc.
Chemical Formular : Be3Al2(Si6O18)
Refractive Index : 1,57 – 1,58
Hardness : 7½ – 8 on the Mohs Scale
Crystal System : Hexagonal