Dark Blue banded agate domed flatback Cabochon, no hole. 40x20mm marquise Dark Dyed Blue banded agate.40x20mm, Marquise cut. A mostly opaque blue that may be nearly black, navy, to lighter aqua colors, with some clear or white sections, often in a stripe pattern. One stone bead. Dark sapphire blue, with tiny white bands. Great to bead around, make into a brooch. Picture is a stock image of the actual stone, which all vary in coloring. I will try to add actual images if you would like a certain one or coloring in particular.