Band one-of-a-kind Australian opal necklaceDescription 10k yellow gold Australian opal necklace, set in Januka's proprietary band setting. This black opal has such vibrant fire that it is like the sea of a summer resort where the water shines and sparkles from the sunlight. This necklace has a silicon adjuster at the back which allows you to shorten it to the length you desire to fit your look of the day. Band collection from Januka uses their proprietary setting method which tactfully carves