18 inches, 10 mm to 11 mm Black Cultured Round Freshwater Pearls, Sterling Silver Round Clasp. Cultured Freshwater Pearl Necklace. Pearls from the seas revered as one of the most beautiful and magical gems on earth. Classic, elegant, and always appropriate. This 18 inch strand of 10 mm to 11 mm Black Freshwater Cultured Pearls would make any wardrobe just lovely. Metal Sterling Silver Length 18 Inches Gemstones Freshwater Pearls Size 10 mm to 11 mm Availability In Stock Shipping Usually in 24 to 72 hours Free Standard Shipping!. 100% Satisfaction Guaranteed!. 30-Day Return Policy. Sku# TL66660N