Web site: https://www.ancient-jewellery.com/
This is an ancient Roman Nicolo cameo of a lady, it dates to the 3rd century A.D. The blue and white of the Nicolo (aka Arabian Onyx) was the highest quality gemstone employed in the ancient glyptic art. Sadly she has a chip on her chin, though otherwise intact and wearable, set into an 18k solid gold finger ring.
DATE: c. 3rd century A.D.
MATERIAL: Nicolo gemstone & 18k Gold
RING SIZE: 8 (US) Q (UK)
SIZE: 26mm x 21mm x 2.3mm (bezel 19mm x 13mm x 7mm)
WEIGHT: 9.64 grams
PROVENANCE: Ex. European Private Collection