CANTELLI double ring with brilliant-cut diamond,

CANTELLI Dual ring with brilliant cut diamond, ca. 0.11 ct, WHITE (H)/VS, emerald ca. 0.09 ct, sapphire ca. 0.12 ct, ruby ca. 0.13 ct, 14K yellow gold, 9.3 g, ring size 52, both rings movably hooked into each other, late 20th century, distinct signs of wear.