Art Deco Platinum Engagement Ring (c. 1920–1925) with 1.20 ct GIA Old European Cut Diamond & Antique Accent Diamonds

This elegant platinum engagement ring is a genuine example of American Art Deco jewelry from approximately 1920–1925, a period celebrated for its architectural design, refined platinum craftsmanship, and sophisticated geometric styling.

At the center is a GIA-certified natural Old European Cut diamond weighing 1.20 carats, graded H color and VS2 clarity. The diamond displays the broad flashes, high crown, and distinctive personality that make Old European Cuts so sought after by collectors and antique jewelry enthusiasts.

The diamond is mounted in a beautifully elevated cathedral-style platinum setting with multiple claw prongs and an ornate pierced openwork gallery beneath the stone. This tall, airy basket construction is quintessentially Art Deco, engineered to admit light from below while creating a dramatic yet elegant presentation.

Along the shoulders, the ring features hand-finished foliate scrollwork and decorative engraving, reflecting the transitional Edwardian-to-Deco aesthetic that was especially popular in the early 1920s. The shoulders are accented with antique single-cut diamonds set in their original platinum mountings. These period-correct accent stones are an important authentication detail, as single cuts were the dominant melee diamond used in fine jewelry of the era.

The ring’s proportions, tapered shank, pierced gallery, original accent stones, and platinum construction all align consistently with authentic 1920s Art Deco manufacture. The result is a ring that combines historical craftsmanship with a beautifully upgraded center diamond, making it equally compelling as an engagement ring or a collector’s piece.

With its original Art Deco mount, intricate handwork, and certified Old European Cut center stone, this ring represents the enduring elegance of the Jazz Age and the golden era of platinum jewelry.

Details

• Era: Art Deco (circa 1920–1925)
• Metal: Platinum
• Center Stone: GIA-certified natural Old European Cut diamond
• Center Diamond Weight: 1.20 carats
• Center Diamond Color: H
• Center Diamond Clarity: VS2
• Certification: GIA
• Accent Stones: Original antique single-cut diamonds
• Setting Style: Cathedral-style solitaire with ornate pierced openwork gallery
• Prongs: Multiple claw prongs
• Shoulders: Hand-engraved foliate scrollwork with original single-cut diamond accents
• Gallery: Open, pierced architectural gallery designed to maximize light performance
• Shank: Gracefully tapered platinum band
• Hallmark: CT PLAT
• Craftsmanship: Hand-fabricated American Art Deco platinum construction
• Origin: American
• Authenticity: Original Art Deco mount with period-correct single-cut diamond accents and authentic platinum construction
• Period Notes: The current 1.20 ct Old European Cut diamond is a later replacement that complements the original mount while preserving the ring's historical integrity.

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