This necklace is handcrafted with an authentic 4mm Ethiopian opal stone in a 12mm gold-plated stainless steel setting. The stone is AAA quality. The chain is 14k gold-filled and will not tarnish easily. This necklace is hypoallergenic. (Cadium free, lead free, and nickel safe) Ethiopian opal is a lucky stone that protects and purifies. Please note that each gemstone is unique and varies in color. Each necklace comes in a ribbon-wrapped box, ready to be gifted. If you would like to leave a note for the recipient, you can do so during checkout.