@Frans_Fashions Judith Ripka 925 Sterling Silver Blue Agate Heart Diamonique CZ Enhancer $150.00. Expand your gemstone collection with this brilliant necklace enhancer. A heart-shaped blue agate gemstone shines with a textured, rope-style border. The enhancer is accented with round, bezel-set Diamonique (simulated diamonds). Three at the bottom and one at top center of heart.  This heart is no longer being made. Collectors item.