This stunning 10K gold Pendant Necklace features an open heart-shaped design with 10 sapphires and 6 diamonds. Gemstones have tested as sapphire and diamond on the Presidium Gem Tester II. The tester cannot detect synthetic from natural stones. However, the teter result information is provided for your reference and consideration when deciding to purchase this item. Please note I am not a jeweler, therefore I cannot guarantee the authenticity of any gemstone.