Antique Pietra Dura Brooch Pendant in 900 Silver

Antique Pietra Dura Brooch from Italy. It is set in 900 silver and is hallmarked at the lower back. Inlay stone work is done in onyx, turquoise, jasper and agate. It measures 1 1/2" by 1 1/4". Has a pin back. The lock is missing from the clasp so it works like a "J" clasp now and does not lock. Also has a jump ring that works as a bail for a chain. Weight: 9.9 grams.