Ririwai Mines, Doguwa, Kano, Nigeria
Size: 2,5 X 2 cm Collection and photo: Arliguie M
© M Arliguie
Twinned crystals Size: 3 X 3 Collection and photo: Arliguie M
© Arliguie M
Collection and photo Yves Masson.
© Yves Masson
Large specimen on matrix porphyry showing single crystals of groups of simple shape, and multiple twins. Ex. Collection G.Gauthier. Collection JF LANOE / Inv. 0560-073
© Jean-François LANOE