Crystals of vesuvianite (idrocrase formerly in French), a selection of specimens of this crystallized mineral species. Vesuvianite is a mineral, here many collectibles presented with a description, one or more photos and sometimes a video. These vesuvianites are for sale. It is a double silicate of alumina and calcium, subgroup of sorosilicates, formed by Ca10(Mg,Fe)2Al4(SiO4)5(Si2O7)2(OH,F)4, and tetragonal crystal system.