Centre stone: Natural aquamarine, untreated. Metal: 925 sterling silver Hallmark: S925 Gemstone weight: approximately 5ct Length: 19 cm, adjustable. Comes with an elegant jewellery box made of 925 sterling silver, set with five natural aquamarines. The gemstones are untreated, and the total weight is approximately 7g. Shipping: We deliver via UPS, Royal Mail, DPD, and other logistics providers. Delivery times depend on your local postal system, but most orders within Europe arrive within 5 to 7 business days.