This is a gorgeous turquoise-green marble Bakelite carved bracelet bangle. It features a chunky domed shape with deep geometric carving all around. The color is an intense green marble tone with milky cloudy swirling and some translucency.
The bracelet has residue of different colors visible on the inner circumference. These are not visible from the outside and are not through. It looks like another darker color of Bakelite was poured in and made in the machinery, and the tool was not cleaned until this lighter color was produced.