Lab Diamond Oval Engagement Ring Featuring a lab diamond centre, the Thea is modern and sophisticated. Little sister to our popular Adah Ring, a smaller centre makes this three-stone style practical without compromising beauty. A basket setting holds the centre stone securely in place while plenty of light can pass through, allowing for maximum lustre. Details & Dimensions Please note, the following stone details are based on a lab VS quality diamond centre stone and are approximate. For each ce