Gemstone Kingdom - Aquamarine
Aquamarine gets its name from the Latin "sea". It is said, This beautiful gem produced in the sea, is the essence of sea water, So Voyager Neptune bless it and pray the safety of navigation, call it"mascot Stone". Features: Molecular formula: Be3Al2 [Si6O18] Refractive index : 1.567-1.590 Birefringence : 0.005-0.007 Hardness: 7.5 Density : 2.68-2 .80 g / ccr Crystal system: the case of hexagonal