Art Deco Sapphire Square Cluster Ring
Striking antique cluster ring formed around a vivid, deep indigo sapphire surrounded by 12 glittering single-cut cut diamonds. The high contrast between the two stones is typical of the bold and stylised aesthetic that became fashionable during the Art Deco period. The ring is finished with subtly scalloped edges and an an openwork gallery which allows plenty of light in behind the stones and accentuates their brightness and sparkle. Crafted in rich 18 carat gold and platinum.
Era: Art Deco, circa 1920
Ring size: P or 7.75 US. Resizeable for £55
Head: 11.1mm by 11.1mm
Stones: Natural Sapphire & Single Cut Diamonds
Marks: Stamped 18CT and PLAT
Condition: Great antique condition; light wear consistent with age including some abrasion to the facet edges.
Full appraisal document provided with each item
This includes a valuation for insurance purposes, item specifics, date, and origins (where applicable)
Gemstones are tested by an accredited gemmologist (Cert GA, Gemmological Association of Great Britain)
Shipping
UPS Express shipping is free of charge on international orders over £300 and it's carbon offset
Tracked and insured with signature on delivery
RM Special Delivery (UK domestic)
US Shipments
US Shipments
US Customs now charges a 10% tariff on all UK shipments as they cross the border. We will pay this customs charge on your behalf. Import duties remain 0% on antiques.
[Last updated: 28th February 2026]
Resizing
Ring sizing is available on most rings
£55 flat fee
Resizing takes 7-14 days
Leave a note at checkout with your desired size
Note: sizing may remove some of the patina (although we take every care to reduce this where possible)
Layaway
25% deposit taken to secure the item. The remaining balance will be settled in 90 days. You can pay installments weekly, monthly, or the full balance at the end - whatever works.
Condition
We offer detailed and accurate condition reports on each listing. These pieces are antique, vintage, or pre-loved and often over 100 years old so they're going to have lived a life. A healthy patina and the odd scuff or scrape is quite normal... it's part of their charm! Everything we present has been checked over by our jeweller and should be good for wear for many years to come (unless otherwise stated) but please remember to treat them with appropriate care and consideration for their age.
Buying a Gift?
Leave a note at checkout and we'll include a handwritten note to the recipient. Just tell us what you'd like to say :)
More Questions?
Get in touch... There's a live chat at the bottom right of the page.
info@lostowl.com
An inscription can be added inside the band, where space allows. Add 3-6 weeks to shipping times Add a note in the cart* with your desired size and/or inscription
*the shopping cart, not checkout