Gemstone: 1,73 ct, Ethiopian Welo Opal, 12 x 8.3 x 3 mm, Untreated Metal: 2,13 g of Sterling Silver Ring Size 7 Total weight: 2,47 g 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.