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Art Deco Emerald Diamond Engagement Ring Platinum Portuguese 1940s/1950s

$9,841.65
£7,455.27
€8,450
CA$13,634.27
A$15,291.75
CHF 8,008.05
MX$185,809.62
NOK 101,688.82
SEK 96,408.17
DKK 64,336.33

About the Item

Art Deco Emerald and Diamond Engagement Ring in Platinum, by Portuguese goldsmith Carlos Joaquim Xavier, 1940s/1950s. This jewel features a vibrant green circular emerald weighing approximately 2.93 carats, set in a secure six-claw mount. The emerald sits proudly above a sculptural architectural shank, enhanced on each side by a pair of channel-set baguette-cut diamonds. The geometric openwork gallery and bold lines evoke the modernist elegance characteristic of Portuguese interpretations of the Art Deco style. Details: • Emerald: Circular-cut; estimated 2.93ct (approx. 10.33 x 10.33 x 5.46 mm); strong green color • Diamonds: 4 baguette-cut; estimated 0.50ct total; G/H color; VS-SI clarity • Lisbon Hallmark “falcon head” (used 1938-1984) for platinum; “rooster head facing right” (used 1938-1984) for gem-set jewelry; maker’s mark “C” for Portuguese goldsmith Carlos Joaquim Xavier (reg. 1949) • Finger size: EU 53 (resizable) • Weight: 5.7g NOTES This item is in good condition, with surface marks and wear consistent with age. All antique, period, and vintage jewels — signed or unsigned — are presented as worn. Unless otherwise stated, all weights, quality assessments, period and origin opinions are based on mounting allowances and standard assessment methods using classic gemological equipment. Variations may occur if cross-referenced with third-party evaluations. Color may vary slightly between screen and natural lighting. Where applicable, certificates and gemological reports are referenced. For any further details or clarification, our team of GIA Graduate Gemologists and certified appraisers will gladly assist. GENERAL INFORMATION Established in 1985 and with three retail boutiques, we specialize in fine jewelry, wristwatches, and rare antiques. Every item may be accompanied upon request by a Certificate of Authenticity or Insurance Valuation, issued by certified antique jewelry experts, registered valuers, and GIA-trained gemologists — ideal for authentication, safekeeping, and insurance. Affiliations • WTA (Watch Trader Association) • GIA (Gemological Institute of America) Alumni • APAOINCM (Portuguese Association of Official Appraisers in Jewelry & Goldsmithing) • APA (Portuguese Antique Dealers Association) • CINOA (International Federation of Art and Antique Dealer Associations) • FORBES 30 Under 30
  • Creator:
    Carlos Joaquim Xavier
  • Ring Size:
    6.5 US, Resizable
  • Metal:
  • Stone:
  • Stone Cut:
  • Weight:
    5.7 g
  • Style:
  • Place of Origin:
  • Period:
  • Date of Manufacture:
    1940s/1950s
  • Condition:
    Wear consistent with age and use.
  • Seller Location:
    Lisbon, PT
  • Reference Number:
    Seller: 356/24E1stDibs: LU2150226826312

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