This necklace is made of base metal with 18K white gold plating. The pendant has 1pc 10mmx10mm heart shaped sapphire color stone surrounded by 17pcs 2mm brilliant clear stones, and especially these stones are Genuine Swarovski Crystals. The twisted bamboo link chain has extension and fits for everyone. You cannot miss such a gorgeous necklace, which will bring a significant difference to your life. It not only makes you cuter, but also let you stand out from others. SKU/Item ID:M37_NLJ0004 Metal Type: Base metal with 18K white gold plating Types of Stones/Pearls: 1pc 10mmx10mm heart shaped sapphire color stone and 17pcs 2mm brilliant clear stones Approx. Total Weight/Size of Center Stone/Pearls: 10mmx10mm Approx. Total Weight/Size of Melee Stone(s)/Pearls: 2mm Stone/Pearl Shape: heart shaped Approx. Item Dimensions: The pendant is 14mmX20mm in size. The chain is 16 inches with 2 inches extension in length and 1mm in thickness. Approx. Total Item Weight: 4.20000226615 grams