The most beautiful and delicate opal butterfly necklace is made with natural opal and set in 925 sterling silver. The butterfly wing is enamel with opal. Butterflies represent hope, rebirth, and transformation. Pair this necklace with our opal chokers or your favorite gold chain for a fun layered look. Product Details: stone size 3MM, weight 3 GRM Approx, width 19.26 MM Approx, height 22.33 MM Approx.