Web site: https://www.ancient-jewellery.com/
This is a nice cameo of a Roman lady, mounted into a modern 18k gold frame for use as a pendant. The cameo appears to be made from a layered hardstone but sold to me as being made from glass. The portrait appears quite early and similar to that found on Classical cameos from Rome of the 2nd century. A nice jewel that is worthy of further research.
OBJECT: Cameo pendant
DATE: 19th century A.D. or earlier
MATERIAL: Sardonyx? (not shell, perhaps glass?)
SIZE: 26.81mm (without hanger 36.46mm) x 20.22mm x 6.91mm
WEIGHT: 7.23 grams