Women's Yellow Gold Diamond and Sapphire Ring Sapphire, in a simple and classic setting, is the centerpiece of this lovely ring. The ring showcases a natural 6 X 4mm oval cut sapphire gemstone, accented wonderfully by 2 white round diamonds. The diamond and sapphire ring is crafted of 10K solid yellow gold. This ring qualifies for free custom ring sizing. Size 7 is standard. When you order a custom size, please allow an additional 7-10 business days processing time.