Sz6 c1864 18k gold Sapphire/diamond antique ring. Birmingham hallmark for 1864, unsure of maker. Marked and tested 18k gold. Old mine cut diamonds and beautiful blue natural sapphires. 1.9 grams. A very special diminutive ring with no issues. The Sapphires are approx .2cttw and the two small diamonds are approx .05cttw.