Gemstone: 7.4 ct Opal (Ethiopia) 18.5 x 10.6 x 7.0 mm, Untreated Metal: 1.29 g of Sterling Silver (Bail + Chain) Chain lenght: 45 cm Total weight: 2.6 g Our Commitments Quality Assurance: The authenticity and quality of our jewelry are guaranteed and every purchase is accompanied by a corresponding warranty card. Should any concern arise, it will be addressed promptly and transparently. Gemstones: Our gemstones are sourced from trusted suppliers, and, when appropriate, examined in our in-house laboratory. Packaging: Our jewelry is presented in high quality packaging — ideal to elevate every gifting or self-indulging experience. Shipping: Parcels are promptly sent via registered air mail with tracking. Higher-value items include insurance coverage.