Made of bright 18 kt yellow gold with a platinum crown waiting for whatever you choose for the featured center. Two round blue sapphires, measuring 3.7 mm in diameter flank the center. The sapphires are a gorgeous violietish-Blue color and also have a nice cut giving way to brilliance. The four prong platinum crown is ready for a gemstone measuring about 8.5-9 mm in diameter. The band at the shoulders measures 2 mm. Size 6.25