10K White Gold 0.75 Carat Heart Cubic Zirconia (CZ) Necklace Same necklace is also available in Yellow Gold, please ask us for more details. Stone Size: 0.75 ct (6.0 mm) x 1 Genuine 10 Karat Solid Gold Necklace. Chain Type, Length, and Clasps are customizable. Please send us a message if you have any questions.