Thomas Sabo Charm Club Collection Sterling Silver and Cubic Zirconia Heart Chain Necklace The highlight of this delicate necklace is the symbol of love. It is decorated with a shining heart in the middle such as heart-shaped and round zirconia elements. The necklace made of high-quality, 925 Sterling silver is a perfect gift for a favourite person or a special lucky charm. Thanks to its extension chain, the length of the round belcher chain can be adjusted from 38 to 42 cm.