A hydrous phosphate of alumina containing a little copper; calaite. It has a blue, or bluish green, color, and usually occurs in reniform masses with a botryoidal surface.
Having a fine light blue color, like that of choice mineral turquoise.
A hydrous phosphate of alumina containing a little copper; calaite. It has a blue, or bluish green, color, and usually occurs in reniform masses with a botryoidal surface.
Having a fine light blue color, like that of choice mineral turquoise.