Art Deco Blue Spinel and Onyx Ring in 18ct White Gold Circa 1920s

A beautifully composed Art Deco blue spinel and onyx ring, dating to the 1920s and crafted in 18ct white gold. At its centre sits a vivid aqua-blue synthetic spinel, cut in a bold rectangular form with crisp facets that catch the light beautifully. To either side, sleek black onyx panels provide a striking contrast, enhancing the clean, architectural lines that define the Art Deco aesthetic. The design is quintessentially of the period—balanced, geometric and confident—offering a wonderful sense of presence on the finger without being heavy. Elegant yet distinctive, this is a piece that speaks effortlessly of 1920s style. Synthetic spinel and black onyx were widely used during the Art Deco period. Advances in gemstone synthesis allowed jewellers to achieve vibrant, consistent colour, while onyx provided dramatic contrast. Together, they became a hallmark of the era’s bold, modern designs—valued not for rarity, but for their striking visual effect and harmony of form. Art Deco period, circa 1920s 18ct white gold (marked 18ct and later mark 750) Synthetic blue spinel centre stone Black quartz (onyx) shoulders Rectangular / modified emerald-style cut Centre stone: approx. 9.0 x 7.2mm Onyx: approx. 5.5 x 1.5mm each Head size: approx. 12mm x 9.7mm Height from finger: approx. 4.4mm Weight: 3.3 grams UK ring size: P Maker’s initials LS Personal inscription “ELSIE” to inner band Accompanied by Birmingham Assay Office gemmology report Excellent condition Presented in the box illustrated Our ref: 2622 Please visit our website to view our full collection: https://www.the-chelsea-bijouterie.com Payment: By Debit/ Credit Card, PayPal or Bank Transfer Shipping: We post worldwide free of charge All items are sent fully insured, tracked and signed for. Terms of Sale: We are totally committed to customer satisfaction. We take great care to give accurate and detailed descriptions accompanied by high definition photos. If you are not entirely happy with your purchase we will gladly offer you a full refund. Please return within 14 days of receipt of your purchase. About Us: We have years of knowledge and experience in dealing in antiques and antique & designer jewellery. We are committed to giving exceptional customer service. The Chelsea Bijouterie aims to offer beautiful and interesting items at affordable prices.