A key-shaped pendant with round details gives this sterling silver pendant necklace a unique look. A key-shaped pendant with amethyst and diamond details gives this silver pendant necklace a unique look. Pendant weight 2.28 GRM Approx Chain length: 18-in. Chain type: cable Metal: sterling silver. Gender: female. Age Group: adult.product details : stone size 1.8 MM, diamond size 1.5/1.4 MM, weight 2.28 GRM Approx.