Martinuzzi Accessories Opal Heart Necklace. Blue Opal Cham Sterling Silver Necklace. Heart Pendant Necklace Blue Synthetic Opal Little Heart Shape size 10mm x 10mm 925 Sterling Silver Gold Plated Chain BEAUTIFUL PACKAGING INCLUDED - This necklace comes inside a pretty MARTINUZZI gift box with bow. Perfect gifts for women, Christmas, San Valentine's, Mother's Day or any other celebration or holiday.