Every Diamond and Opal Necklace in this collection is hand cut, hand polished and handcrafted. Rare and one of a kind, your unique Opal Necklace can never be replicated or reproduced. Providing the best quality Opal necklace, Opal birthstone necklace, pink Opal necklace and more at miner direct prices. Certificate of Authenticity for items over $1,000. 30 Years of Experience. Fast, Easy & Direct worldwide shipping makes purchasing your own piece of Opal direct from Australia easier than ever before!