KOTTIGITE Zn3(AsO4)2·8H2O (monoclinic) . vivianite group . dark green prismatic crystal spray on limonite . Mina Ojuela, Mapimi, Durango, Mexico . 深綠色或藍色柱狀結晶，呈放射線狀夾雜於褐鐵礦間隙，硬度３，為罕見之礦！

經典名礦欣賞 ．２
NO.104