Type of jewel: Vintage antique 1920s Art Deco diamond and sapphire ring Condition: In well-preserved condition, especially given the jewel`s age. Style: Vintage 1920's Art Deco Style characteristics: Abstract motives and geometrical forms are quite typical for the Art Deco period. Era: ca. 1920 Material: 18K white gold (touchstone tested) Diamond(s): One old mine brilliant cut (also called bolshevic) with an estimated weight of ± 0.15ct. (colour and clarity: H/J, vs/si). Four senaille and rose cuts. A senaille is a simplified rose cut diamond, a small diamond chip with perhaps a few polished facets. - 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. - We understand that private buyers may expect diamond weights to be provided, but in the case of rose-cut or senaille diamonds, this is simply not standard practice among industry professionals specialising in antique and vintage jewellery. Unlike brilliant-cut diamonds, where weight correlates with diameter, rose cuts vary in thickness, making weight estimation impossible once set. Providing such figures could lead to unnecessary debates, as rose-cut diamonds were traditionally valued for their visual effect rather than intrinsic worth. Even major auction houses like Sotheby’s and Christie’s rarely list their weight, except for exceptionally large stones, where diameter is often provided instead. - All diamonds, regardless of their size or shape, in our vintage and antique jewellery are verified as 100% natural by the IJGC laboratory. Precious stone(s): Two sapphires. We did not check whether these are natural or lab produced stones, as this information has no influence on the value of the jewel. Both natural and lab produced stones were used in this era, rather for their effect than for their intrensic value. with an estimated weight of ± 0.30ct. - It is common practice to treat gemstones to enhance their clarity or colour. This item has not been tested for such treatments. - All gemstone weights are approximate, as the stones are not removed from their settings to preserve the integrity of the piece. Birth and month stones: Diamond is the birthstone (or month stone) for April and Sapphire is the birthstone (or month stone) for September. Hallmarks: Illegible remains. Dimensions: band width top of ring 0,54 cm (0,21 inch) - See picture with a ruler in cm and inches Weight: 1,80 gram (1,16 dwt) Ring size: EU-51 & 16¼, USA-5½, UK-K½ Ring sizes are professionally measured and rounded to the nearest millimetre; slight variations are standard and do not affect wear. Adin reference Nº: 26089-0341 - 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.