Oxidized sterling silver, 18k yellow gold, or 18k rose gold Tiny: 18 black diamonds (1mm, 0.09ct), 1 ruby (1.75mm, 0.02ct) with 18" chain Medium: 50 black diamonds (1.25mm, 0.50ct), 1 ruby (2.25mm, 0.04ct) with 22" chain Large:18 black diamonds (3mm, 0.75ct), 1 ruby (3mm, 0.11ct) with 30" chain Handmade in California