Pendant/brooch with agate gem,

Pendant/Brooch with engraved agate gem, oval, ca. 29 x 21.5 mm, girls head, looking left, 4 brilliant cut diamonds, totalling ca. 0,20 ct, WHITE (H)/VS, 8 rose cultured pearls, D: ca. 3 mm, 18K yellow gold, 10.0 g, H (with/without loop): ca. 41/36 mm, W: ca. 25 mm, mid 20th century, minor signs of wear.