Centre stone: Natural ruby (treated) Metal: 925 sterling silver Hallmark: S925 Gemstone weight: approximately 3 carats Comes with an elegant jewellery box. The metal is 925 sterling silver, set with a natural ruby. The ruby has been treated; the specific treatment has not been identified, but is typically a filling treatment. The total weight is approximately 11g. 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.