Mineralogically, zoisite is a member of the epidote group, the other members of which are clinozoisite, epidote pe rse, piemontite, and allanite.
从矿物学上讲,黝帘石是绿帘石家族的一员,绿帘石还有褐帘石等。
英语百科
Piemontite
Piemontite is a sorosilicate mineral in the monoclinic crystal system with the chemical formula Ca2(Al,Mn,Fe)3(SiO4)(Si2O7)O(OH). It is a member of the epidote group.
Red to reddish-brown or red-black in colour, Piemontite has a red streak and a vitreous lustre.