Beryl
Hardness: 7,5-8 Color: colorless (goshenite), golden (golden beryl), yellowish green (heliodore), sky-blue, sea-green (aquamarine), green /emerald green/ (emerald), pink (morganite,) red (bixbite/red beryl) Formula: Be3Al2(Si6O18) Crystal System: hexagonal It has got its name from the greek word beryllos. On the name beryl we mean the minerals of the beryl group (above at the colors). Those...