Dark Blue Opal Hamsa Necklace with Silver Chain Imported Dark Blue Opal Hamsa Necklace and Silver Chain Opal, from the Greek, "Opallos" meaning to see a change of color &#x2022;This Pendant measures .35 inches from left to right and .35 inches from top to bottom 925 Silver Chain 16" Let the Hamsa protect you from evil spirits and look stylish at the same time