Enhance your solitaire. 1/4 ct. T. W. Diamond solitaire enhancer is set in 14k gold and features 20 round diamonds in an invisible setting. Due to the nature of pre-owned jewellery, the ring you choose may have been previously sized. Ring styles from our pre-owned jewelry inventory are sold at their current size and cannot be resized at purchase. As this inventory constantly changes, we are unable to state or guarantee the size of any pre-owned ring.