Click on thumbnails for a larger image. Please be patient since some of these pages of thumbnail images take some time to load. These mineral photos are copyrighted by their owners and may not be used without permission.
Osumilite-(Mg): (K,Na)(Mg,Fe++)2(Al,Fe+++)3(Si,Al)12O30
Comments: Sapphire-blue colored osumilite-(Mg) crystal in dacite. Location: Yamanoguchi, Iriki, Satsuma-gun, Kagoshima Prefecture, Kyushu Island, Japan. Scale: Crystal Size 0.05 cm. © Jeff Weissman / Photographic Guide to Mineral Species