Opal Heart Necklace White Opal Heart Sterling Silver Chain Necklace. Small Simulated Opal Heart Pendant Necklace HIGH QUALITY Gold Plated 925 Sterling Silver link chain with spring ring closure. AUTHENTIC white lab-created opal heart pendant. HEART PENDANT SIZE: 10 mm x 10 mm. SHOW YOUR LOVE! This dainty and cute heart pendant necklace is a perfect gift for a special person. A fantastic necklace to give as Valentine's day gift. BEAUTIFUL PACKAGING INCLUDED - This necklace comes inside a pretty MARTINUZZI gift box with bow. Perfect gift for women on Christmas, San Valentine's, Mother's Day or any other celebration or holiday.