Bone bracelet with gemstone setting

Bone bracelet with gemstone setting: 20th c. Brass plate, bone, gemstone-like decoration. Good condition. Size: larger - outer size: 9 x 8,5 cm, inner 6 x 5,5 cm, thickness 2,5 x 1,5 cm smaller - outside 7,5 x 8 cm, inside 5,5 x 5,5 cm, thickness 1,5 x 1 cm