Bazzite
Bazzite is a beryllium scandium cyclosilicate mineral with chemical formula: Be3Sc2Si6O18 (Be3(Sc,Fe)2Si6O18 or Be3(Sc,Al)2Si6O18). It crystallizes in the hexagonal crystal system typically as small blue hexagonal crystals up to 2 cm length. It has a Mohs hardness of 6.5-7 and a specific gravity of 2.77 to 2.85.