From a mineralogical point of view, chrysoberyls are aluminium oxide containing beryllium, and thus actually have little in common with the beryls, which belong to the silicate family. Indeed, with their excellent hardness of 8_ on the Mohs Scale, they are clearly superior to the beryls. The popular chrysoberyls come in many nuances between lemon and greenish yellow, and in honey colors and shades from mint green to brownish green, and are mostly found in the gemstone deposits of Brazil, Sri Lanka or East Africa.