Diopside is a mineral of the pyroxene group. It is closely related to the most common pyroxene augite. Composition of pure diopside is CaMgSi2O6 but there is a complete solid solution to hedenbergite CaFeSi2O6 and also to augite (Ca,Mg,Fe2+,Fe3+,Al)2(Si,Al)2O6. These three are collectively named calcic clinopyroxenes and the boundaries between them are arbitrarily chosen to […]