bazzite

{{infobox mineral | name = Bazzite | image = Bazzite - Fibbia Ticino Switzerland.jpg | imagesize = 260px | alt = | caption = Bazzite from Fibbia mountain, Fontana, Central St Gotthard Massif, Leventina, Ticino, Switzerland | category = Cyclosilicate | formula = Be3Sc2Si6O18 |IMAsymbol=Bz | molweight = | strunz = 9.CJ.05 | dana = | system = Hexagonal | class = Dihexagonal dipyramidal (6/mmm) H-M symbol: (6/m 2/m 2/m) | symmetry = P6/mcc | unit cell = a = 9.521 Å, c = 9.165 Å; Z = 2 | color = Light to dark sky-blue, blue green | colour = | habit = Aggregates of subparallel prisms | twinning = | cleavage = Indistinct on {0001} | fracture = Irregular | tenacity = Brittle | mohs = 6.5–7 | luster = Vitreous | streak = Pale bluish white | diaphaneity = Semitransparent | gravity = 2.77–2.85 | density = | polish = | opticalprop = Uniaxial (−) | refractive = nω = 1.622–1.637 nε = 1.602–1.622 | birefringence = 0.0210 | pleochroism = O = pale greenish yellow; E = intense sky-blue | 2V = | dispersion = | extinction = | length fast/slow = | fluorescence = | absorption = | melt = | fusibility = | diagnostic = | solubility = | impurities = | alteration = | other = | references = }} Bazzite is a beryllium scandium cyclosilicate mineral with chemical formula ( or ). 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.

It is hard to distinguish from blue beryl.