Koma Stone Armband, Ghana

Slender for its kind, with a smoky brown face and a knobby ridge.

This granite armband is Koma, from Northern Ghana, West Africa. A band cut from solid stone is heavy and smooth, and its simple circular form changes little from one maker to the next. Slightly oval band in dark brown, with a lustrous, waxy sheen and a few pale flecks. A raised ridge winds along the outer curve, and the opening has a faintly angular outline. It is 4.25 inches wide, 4.25 deep and 0.75 high.

A modest ring with an uneven shape and plenty of shine.