Pic Description: Beryl also called "Emerald", the formula Be3Al2 (SiO3) 6, which contains beryllium oxide (BeO) 14.1%, aluminum oxide (Al2O3) 19%, silicon oxide (SiO2) 66.9%. Hexagonal crystal hexagonal prism, cylinder with vertical stripes, vigilance may be very small, but it may take up to a few meters. Hardness of 7.5-8, a specific gravity of 2.63 - 2.80. Pure beryl is colorless or even transparent. But most of the green, there are light blue, yellow, white and rose-colored, shiny glass. The word comes from the Greek English Beryl "sea-like blue-green" (beryllos).
