A striking Dutch Art Deco bar brooch, crafted circa 1920 in 18K yellow gold with a platinum or white gold top. Its elongated form is set with sapphires and old-cut diamonds, framed by subtle rose cuts and senailles. Once part of a transformable jewel, it now stands alone as a refined piece echoing the streamlined glamour of the Roaring Twenties. Antique jewelry object group bar brooch Condition very good condition Country of origin Netherlands Style Art Deco - Art Deco is an eclectic artistic and design style which had its origins in Paris in the first decades of the 20th century. The style originated in the 1920s and continued to be employed until after World War II. The term "art deco" first saw wide use after an exhibition in 1966, referring to the 1925 Exposition Internationale des Arts Décoratifs et Industriels Modernes that was the culmination of high-end style modern in Paris. Led by the best designers in the decorative arts such as fashion, and interior design, Art Deco affected all areas of design throughout the 1920s and 1930s, including architecture and industrial design, as well as the visual arts such as painting, the graphic arts and film. At the time, this style was seen as elegant, glamorous, functional and modern. See also: Art Deco Style specifics Abstract motives and geometrical forms are quite typical for the Art Deco period. Period ca. 1920 Material 18K yellow and white gold or platinum (touchstone tested) Diamonds One old brilliant cut diamond with an estimated weight of ± 0.17ct colour and clarity F/H, vvs/vs Six single brilliant cut diamonds (also called 8/8) with an estimated weight of ± 0.14ct colour and clarity F/H, vvs/vs Fourteen rose cut diamonds and senailles . A senaille is a simplified rose cut diamond, a small diamond chip with perhaps a few polished facets. We do not have the weight of the rose cuts diamonds nor the senailles which is normal in our trade when it comes to rose cut diamonds and senailles. Total diamond count without rose cuts Seven pcs. Total diamond weight without rose cuts approx. 0.31 crt with an average colour and clarity F/H, vvs/vs - 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. - We do not sell lab-grown (synthetic) diamonds. Precious stones Eighteen sapphires . We did not check if the sapphires are lab produced or not as this information has no influence on the value of this jewel. Natural sapphires and lab produced sapphires were both used in this era, rather more for their effect than for their intrinsic value. It is a very common practice to treat gemstones to intensify their clarity or colour. The item in question has not been tested in this regard. Birthstones Diamond is the birthstone (or month stone) for April and sapphire for September. Hallmarks The Dutch control mark representing a lion's head for 18K gold (used between 1906-1952) Dimensions 6,90 cm (2,72 inch) x 0,50 cm (0,20 inch) Weight 4,40 gram (2,83 dwt) Adin Reference Nº 25141-0140 - Accompanied by a professional report of authenticity for your peace of mind. - Shipped insured and registered for your security, though you're most welcome to collect in person. - 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 products, visit: https://auction.catawiki.com/lotsfrom/Adin - Antique and vintage jewellery often undergoes thoughtful refurbishment, remodelling, or repairs to enhance its longevity and wearability. Such pieces frequently bear marks of this tender care. Furthermore, we present our antique and vintage jewellery in its authentic state, refraining from removing scratches or applying rhodium plating to white gold items. Our priority is to preserve the genuine allure and history of each piece. However, as the new owner, you have the option to take it to a local goldsmith for a cosmetic refresh, should you choose.