This very pretty 1940-1950s sterling silver onyx brooch is a classic beauty with nice aged patina and good size.
The onyx stone is a centered oval shape that is bezel set. The onyx stone measures approximately 5/8" north to south and 1-5/16" east to west. The overall pin measures 17/16 north to south and 2-5/16" east to west. It weighs a hefty 15.7 grams and is marked 925 on the back.
The pin mechanism is in good working order with a secure closure. There is some gentle subtle wear noted on the face of the onyx stone which is consistent with the wear of the piece by the previous owner.
This ring is a great vintage find!