Vintage Ring With 11.00 Carat Natural Sapphire – Origin Sri Lanka, Diamonds –

Vintage 11.00 Carat Natural Sapphire Ring – Origin: Sri Lanka, Diamonds – 18k Gold Description: This vintage ring from the 1980s features a large, high-quality natural sapphire, accompanied by diamonds, and certified by the International Gemological Institute (IGI). The central stone is an 11.00 carat emerald-cut natural sapphire (corundum) with an intense and transparent "Deep Blue" color, a key criterion for appreciating high-weight sapphires. At this carat weight, the combination of a large size, color saturation, and transparency is rare on the market, as large sapphires often exhibit overly dark hues or limited transparency. The IGI certificate, issued by the International Gemological Institute, an internationally recognized laboratory historically based in Antwerp, confirms the stone's authenticity, its nature, its gemological characteristics, and its origin. The report mentions a heating treatment, a traditional and widely accepted process in the sapphire trade, used to stabilize and enhance color without altering the gem's natural character. The stone is attributed to Sri Lanka (Ceylon), a region historically renowned for its sapphires of remarkable brilliance, stable color, and fine crystallization. The observed natural inclusions are consistent with a non-synthetic stone and contribute to its gemological identity. The 18-karat yellow and white gold setting is adorned with four baguette-cut natural diamonds, which structure the composition and highlight the central stone without detracting from it. The overall design elegantly exemplifies the jewelry aesthetic of the 1980s, combining presence, balance, and understated sophistication. Specifications Setting Type: Vintage Ring Era: 1980s Metal: 18k Yellow and White Gold (750 Hallmark) Total Weight: 10.55 g Ring Size: 56.5 Center Stone (IGI Certificate) Nature: Natural Sapphire Species: Corundum Cut: Emerald Dimensions: 14.75 × 10.45 × 6.30 mm Estimated Weight: 11.00 carats Color/Transparency: Deep Blue, Transparent Characteristics: Natural Inclusions Treatment: Heat Indication Origin: Sri Lanka (Ceylon) Side Stones Number: 4 Baguette Cut Natural Diamonds Estimated Total Weight: 1.10 carats Color: F – G Clarity: VVS – VS Finish: Very Good to Good Certification Laboratory: International Gemological Institute (IGI) Location: Antwerp Report Type: Jewelry Report Number: 10J2181725 Date: November 20 2025