Silver Ring - Hallmarked 925 - Size 52.5 Fr. Vintage, Aquamarine - Solid Design, sterling silver ring, hallmarked and set with an oval-shaped aquamarine Size 52.5 FR, approximately 16.75 mm. Its weight is approximately 4.7 g. Good vintage condition. Condition: Used: Item has been worn... Used: Item has been worn. Possible imperfections. Dominant stone: Aquamarine Brand: Vintage Type: Set ring Dominant color: Silver Size: 52.5 Material: Non-metal: Sterling silver.