This sapphire and diamond ring is made of 18k white gold. It contains a top quality GRS certified (GemResearch SwissLab) natural Ceylon sapphire in a royal blue color weighing 4.50 carats adorned by 2 oval cut diamonds G-H color, VS clarity weighing 0.47 CTTW, and 58 round cut diamonds G color, VS clarity weighing 1.23 CTTW.