Art Deco jewellery — produced roughly between 1920 and 1939 — represents one of the most collectible and immediately recognisable periods in jewellery history. Bold geometry, platinum settings, and a palette of contrasting gemstones define the era. Whether you're a first-time buyer or a seasoned collector, this guide will help you identify authentic Art Deco pieces and understand what drives their value.
What Is Art Deco Jewellery?
The Art Deco movement emerged in the aftermath of World War I, reflecting a society hungry for modernity, glamour, and optimism. In jewellery, this translated into sharp geometric forms — chevrons, stepped patterns, sunbursts, and fan shapes — executed with extraordinary precision. The style was a deliberate break from the organic, nature-inspired curves of the preceding Edwardian and Art Nouveau periods.
Key Characteristics to Look For
Geometric design: Symmetry and angular forms are the hallmark of the era. Look for rectangles, octagons, triangles, and repeating linear patterns.
Platinum settings: Platinum became the metal of choice in the 1920s, prized for its strength and its ability to hold diamonds and gemstones in minimal, elegant mounts. White gold was used as a more affordable alternative.
Contrasting colour combinations: Art Deco jewellers loved bold colour contrasts — onyx and diamond, emerald and ruby, sapphire and rock crystal. The palette was deliberate and graphic.
Calibré-cut gemstones: Stones were often cut to fit precisely within geometric settings, a technique called calibré cutting. This required exceptional skill and is a mark of quality in period pieces.
Milgrain detailing: Fine beaded edging along metal borders — known as milgrain — is a common finishing technique in Art Deco jewellery and a useful authentication detail.
Popular Gemstones of the Era
Diamonds dominated, particularly in old European and transitional cuts that predate the modern brilliant. Alongside diamonds, sapphires, emeralds, rubies, onyx, coral, jade, and rock crystal were widely used. The influence of Egyptian, Japanese, and Chinese motifs — sparked by archaeological discoveries and trade — brought exotic materials and imagery into European jewellery design.
How to Authenticate an Art Deco Piece
Check the hallmarks: British pieces will carry assay office marks indicating metal purity and date. French pieces often bear maker's marks (poinçons) and import marks. Platinum is typically marked PT or PLAT.
Examine the construction: Authentic period pieces show hand-finishing, slight asymmetries in milgrain work, and evidence of age-appropriate wear. Modern reproductions often have machine-perfect uniformity.
Assess the cut of the stones: Old European cut diamonds — with their high crowns, small tables, and large culets — are characteristic of the period. Modern brilliant cuts suggest a later date or stone replacement.
Seek provenance: Original boxes, receipts, or family history add significant value and confidence. Ask the seller for any documentation they hold.
What to Expect to Pay
Art Deco jewellery spans a wide price range. Simple geometric brooches or dress clips can be found for a few hundred pounds; significant diamond and platinum pieces from major houses command tens of thousands. Condition, maker, gemstone quality, and rarity of design all influence value. Pieces by known makers — Cartier, Van Cleef & Arpels, Boucheron — carry a premium, but unsigned pieces of equal quality can represent excellent value.
Caring for Art Deco Jewellery
Platinum is durable but develops a natural patina over time — many collectors prefer this, but it can be polished out by a jeweller if desired. Avoid ultrasonic cleaners for pieces with onyx, coral, or organic materials, which are sensitive to vibration and chemicals. Store pieces individually to prevent scratching, and have prongs and settings checked periodically by a specialist.
Shop Art Deco-Inspired Pieces
At Constantine Jewels, we curate a carefully selected range of vintage and antique jewellery with strong provenance. Browse our vintage rings collection for Art Deco-era rings, or explore our necklaces collection for period pendants and chains.
Each piece in our collection is chosen for its quality, character, and story. If you're looking for something specific or would like guidance on a purchase, we're always happy to help.