Sterling Silver Tanzanite Women's Ring 1/2 cttw, 6x4mm Oval (Available 5,6,7,8,9) MEASUREMENT - Center Stone: 6x4 mm, 100% Natural Blue Tanzanite Ring (All the sizes displayed are in stock) Crafted in 925 Sterling Silver. This beautiful design jewelry is unique and elegant,which is suitable for you to wear at any occasion and can be matched with any outfit. CRAFTED - in High-Quality Lead Free 925 Sterling Silver that delivers exceptional shine and ultimate protection. CARAT TOTAL WEIGHT - 0.50 CT (This item is proudly custom made in the USA) TOTAL SATISFACTION GUARANTEE - When you order today, you're protected. The item comes with a No questions asked money back guarantee combined with world class customer service. Free Return and Refund and Lifetime Warranty and Free Second Day Delivery for Amazon Prime! Gemstones may have been treated to improve their appearance or durability and may require special care.