Type of jewel: Vintage 18K gold diamond ring Condition: In well-preserved condition, especially given the jewel`s age. Style: Vintage Era: ca. 1980 Material: 18K yellow gold (touchstone tested) Diamond(s): Thirteen brilliant cut with an estimated weight of ± 0.62ct. (colour and clarity: F/H, vs/si). - When we provide weights, colour grades, and clarity of diamonds, these are approximate unless otherwise stated, as we do not remove diamonds from their settings to preserve the integrity of the piece. - All diamonds, regardless of their size or shape, in our vintage and antique jewellery are verified as 100% natural by the IJGC laboratory. Birth and month stones: Diamond is the birthstone (or month stone) for April. Hallmarks: "750" suggesting 18K gold Dimensions: band width top of ring 1,47 cm (0,58 inch) - See picture with a ruler in cm and inches Weight: 3,50 gram (2,25 dwt) Ring size: EU-53 & 17 , USA-6¼, UK-M Ring sizes are professionally measured and rounded to the nearest millimetre; slight variations are standard and do not affect wear. Adin reference Nº: 26026-0219 - All jewels are delivered in an Adin jewellery box. Boxes shown in photos are display props unless stated otherwise. - Every piece is accompanied by an Adin certificate of authenticity for your piece of mind. Adin has specialised in antique and vintage jewellery in Antwerp for over four decades. We maintain professional memberships and affiliations that reflect our ongoing commitment to standards, research, and responsible trade practice. - Shipped insured and registered. Collection in person is also welcome. - For shipments outside the EU, import duties and other charges may apply. We advise checking this in advance. - We invite you to browse through our customer feedback to discover the level of satisfaction we consistently provide. - See more of our pieces: https://auction.catawiki.com/lotsfrom/Adin - Antique and vintage jewellery may show evidence of past repairs or restoration, reflecting normal wear and period use. We present pieces in an authentic state and do not routinely remove surface marks or apply rhodium plating to white gold. If you prefer a brighter finish, you may choose a cosmetic refresh by a local goldsmith.