Potassic Ferro Chloro Sadanagaite
3.82 ct
Trilion Cut
11.00 x 11.00 mm
island of Yuge
max4931

Potassic-ferro-chloro sadanagaite

Is one of the many amphibole minerals discovered in Japan in the .Is rich in potassium and iron .The formula is KCa₂(Fe2+3Al₂)(Si₅Al₃)O₂₂(OH)₂ and hardness of 6.