The Catherine Prevost 18K Opal Ring in size 6 is a stunning piece of fine jewelry perfect for a birthday occasion. The ring features a natural white opal as the main stone set in white gold with a square shape with tiny diamond accents. This cocktail ring by Cathrene Prevost London is not enhanced, making it a unique and elegant addition to any jewelry collection. The ring is resizable and weighs 4.01 grams, showcasing the beauty and craftsmanship of the piece.