This spellbinding 18K yellow gold statement ring showcases a luminous, iridescent centerpiece framed in a bold architectural band. Sourced from fine estate collections, this pre-loved unbranded creation features a 3.00-carat oval cabochon rainbow opal that flashes vibrant spectral play-of-color under natural light. The central gem is horizontally bezel-set and flanked along the shoulders by four round brilliant-cut natural diamonds totaling 0.12 carats of bright G color and eye-clean VS clarity. Sized at 49 EU / 10.5 HK and weighing a substantial 6.58 grams of solid gold, this smooth, wide-profile band delivers a warm, golden luxury aesthetic with outstanding daily wearability. TECHNICAL SPECIFICATIONS Jewelry type: Ring (Classified as Statement / Band style) Metal: 18K Yellow Gold Hallmarks: 750 (Observed stamped on the interior shank) Ring size: 49 EU / 10.5 HK Shank profile: Wide tapered shank (Observed) Setting style: Bezel setting (for main stone) with accent inset setting (for diamonds) Prong count: NA Main Stone: - Stone: Natural Rainbow Opal - Quantity: 1 stone - Carat weight: 3.00 ct - Shape: Oval cabochon - Color: Rainbow (Play-of-color) - Clarity: NA Side Stone: - Stone: Natural Diamond - Quantity: 4 stones - Total carat weight: 0.12 ct - Shape: Round brilliant - Color: G - Clarity: VS Total carat weight: 3.12 ct Total jewelry weight: 6.58 g Lot ID: 284519 SKU: SR-YG-284519 Certification: None CONDITION REPORT Condition: Pre-owned Visible flaws: None; the 3.00ct oval rainbow opal cabochon and all four natural side diamonds are present and securely mounted within their gold settings, the solid 18K yellow gold band displays a bright mirror finish, and the shank retains complete structural integrity. EXPERT NOTES Based on visual evidence from the provided images and model photography, the ring exhibits a wide, sculptural signet-style mounting crafted in solid 18K yellow gold. The central 3.00-carat oval opal cabochon is mounted horizontally in a smooth bezel rim that protects the gemstone while highlighting its natural play-of-color. Diagonal carved ribbons sweep smoothly across the shoulders, housing two round brilliant diamonds on each side set flush into raised accent panels. The interior shank is finished with a smooth polish for comfortable wear and is cleanly stamped with an observed 750 gold purity hallmark. WHY A BUYER WILL LOVE THIS PIECE Buyers will fall in love with this substantial 6.58-gram ring for the magical play-of-color displayed by its 3.00-carat rainbow opal and the warm contrast of rich 18K yellow gold. The smooth, wide-profile design offers a bold yet low-profile silhouette that sits flush against the finger without snagging. Sourced sustainably from fine estate collections, choosing this pre-loved unbranded heirloom represents an eco-conscious luxury choice that celebrates circular fashion while preserving the Earth's natural resources. To ensure absolute peace of mind, every piece in our collection undergoes a rigorous physical authentication process before delivery. This includes gold purity verification to guarantee solid gold composition, microscopic analysis of each gemstone by certified gemologists to verify its natural origin and identify any treatment, and a meticulous physical inspection to confirm setting security and structural integrity. Worldwide Insured Shipping: We securely ship our estate and vintage jewelry collections globally, with frequent deliveries to the USA, UK, Europe, Australia, and beyond. Every international package is fully insured and trackable for your peace of mind. For special needs please feel free to contact us. Please read all the important information below. Please note that the photos provided may show slight variations from the actual item due to lighting, angles, and screen settings. We strive to accurately represent each item's color and details, but slight differences may occur. Rest assured, we aim to provide the most accurate portrayal possible to ensure your satisfaction with your purchase. If you have any questions or require further clarification, please feel free to reach out to us. If the winning bidder decides to cancel/withdraw they will bear the risk, cost of all shipping, and return import duties of the seller. NO RESERVE ITEMS TERMS: We invite you to explore and bid on our exciting no-reserve items! To ensure a transparent and positive experience, please note a few key terms. Some pieces may not include formal certification, and a post-purchase resizing service is available for an additional fee. This service applies only to eligible rings where resizing is physically possible and must be requested within 24 hours of purchase to avoid shipping delays. Your bid is a binding commitment to purchase, and while returns may be accepted under specific circumstances, they are subject to a return fee. Please proceed with your bid only when you are comfortable with and fully accept these conditions. Happy bidding! RESIZING REQUEST: We are pleased to offer complimentary resizing for a change of up to two ring sizes, either up or down. This service is available for all eligible rings, provided the adjustment is physically possible, and must be requested within 24 hours of your purchase to ensure prompt shipping. For any adjustments beyond this range, our policy varies: making a ring larger by more than two sizes will incur an additional fee to cover the cost of adding more gold, while making a ring smaller by more than two sizes remains a complimentary service, as long as it is physically possible. Shipping: 100% Insured. Shipments that are shipped out will be provided with a tracking number. The buyer is responsible for any local customs or VAT fees that might apply to the purchase. -Import duties and taxes are not included in the item price. The Import process is very simple as the shipping company does the entire import procedure, all the customer has to do is pay the VAT and customs clearance. -in Portugal please note that to get the package you will need to use a local broker (new Regulation) -in France, the price of the shipping fee includes the brokerage fee. Due to the country's regulations, customs clearance must take place with a customs broker, so please be aware that shipping time can be 7-12 business days. All the customer has to do is pay the VAT. -in Switzerland, the VAT is only 7%. -in Hong Kong and the USA the VAT is 0%.