Aquamarine
Aquamarine is a well known gem used frequency in jewellery. It comes in various tones of blue, obtaining its name from Latin, the translation being “water of the sea”
Chemical Formular : Be3Al2Si6O18
Refractive Index : 1.570 to 1.592
Hardness : 7.5-8 on the Mohs Scale
Crystal System : Hexagonal