One center 7×5 mm (0.28″ x 0.20″)colorful Opal and eight 3.5 mm (0.14″) Beautiful round cut Tanzanites set in a Solid Sterling Silver large Victorian style cluster setting with a Stunning Art Nouveau carving on the shoulders. The Lilac Blue color of the Tanzanites picks out wonderfully the blue colors within this large central Opal. all the gemstones are Solid all Natural Gems. Authenticated Solid Sterling Silver – on the inside of the shank there is a full British Hallmark which includes 925, the leopards head and the royal lion, only high quality silver will have a full marking such as this.All the Tanzanites & Opal in this ring are Genuine Natural Gemstones.