Exquisite Antique Gustav Manz 18K Gold Shield Agate Intaglio Men's Ring
Gustav Manz Men’s Ring – 18K Yellow Gold Shield-Shaped Agate Intaglio
Explore our collection of rare men's rings
Celebrate the artistry of one of early 20th-century New York’s most gifted designers. This exceptional men’s ring, crafted by the renowned Gustav Manz, features a shield-shaped agate intaglio set in richly toned 18K yellow gold. Manz was a celebrated sculptor and jewelry designer whose work adorned pieces for prestigious houses such as Tiffany & Co., Marcus & Co., and Black, Starr & Frost.
The ring’s bold yet refined design is enhanced by ornate floral accents along the shoulders, a testament to Manz’s signature style—nature-inspired, architectural, and meticulously executed. Rare and historically significant, this piece embodies the golden era of American jewelry craftsmanship.
Key Features:
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Designer: Gustav Manz, noted for collaborations with top American jewelers
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Metal: 18K Yellow Gold
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Gemstone: Shield-shaped carved agate intaglio
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Design Motif: Ornate floral accents and sculptural goldwork
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Ring Size: 11.25 (Resizable upon request)
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Era: Early 20th century – American Arts & Crafts / Edwardian influence
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Provenance: An authentic workshop creation attributed to Manz, admired for its craftsmanship and historic importance
Why Collectors Love It:
Gustav Manz’s unsigned masterpieces are now being rediscovered and celebrated in museum exhibitions and scholarly publications. Pieces like this are prized for their exceptional design and the artistry hidden behind the scenes of America’s great jewelry houses.
Antique Vintage Rings
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Buy with confidence. Every piece is backed by:
• Authenticity — examined and verified before listing
• Condition — carefully inspected and honestly described
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• 32-day returns — available on eligible, unaltered items
• Private appointments — available in New York
• Experience — over 50 years of fine jewelry expertise
How do I know a piece is authentic, and can I trust DSF?
Buying fine jewelry online takes trust, especially at this level. DSF Antique Jewelry is a New York–based dealer with over 50 years of fine jewelry expertise. Every piece is examined for authenticity and condition before it is listed — we assess hallmarks, maker's marks, metal content, gemstones, and construction consistent with the stated period or designer. For signed pieces such as Cartier, Buccellati, or Van Cleef & Arpels, we verify maker's marks and signatures. We're glad to send additional photographs of any hallmark, or speak with you directly, before you decide.
Why does antique gold look different, and is surface wear normal?
Antique pieces were often made in gold standards less common today, such as 15ct (used in Britain only between 1854 and 1932), 9ct, or higher-karat continental gold, which give a warmer tone than typical modern 14k. Light surface wear, softened edges, and a gentle patina are normal and expected on antique jewelry — they reflect the age and authenticity of the piece, not flaws. We describe the true condition of every item honestly in its listing.
What do the hallmarks and maker's marks mean?
Hallmarks are small stamped marks that identify the metal standard, and often the maker, assay office, and date. They are one of the best tools for authenticating antique jewelry. We identify and explain the marks we find on each piece in its description, and we're happy to send close-up photographs of any hallmark on request so you can see exactly what you're buying.
Can pieces be resized or adjusted?
It depends on the piece. Many antique rings can be resized, but bands with all-around engraving, thin shanks, or gemstones near the base may be limited in how far they can safely go, and some pieces are best left as-is to preserve their integrity. We list each item's measurements as they currently are. If you're unsure whether something can be safely adjusted, contact us before buying and we'll give you an honest assessment for that specific piece.
How should I care for and store fine jewelry?
Clean gently with a soft cloth, avoid harsh chemicals, ultrasonic cleaners, and chlorine, and store pieces separately so they don't scratch one another. Remove rings and bracelets for heavy manual tasks. Antique gold is softer than modern alloys, so period pieces are best enjoyed with normal care. Treated well, fine antique jewelry lasts for generations — many of our pieces are already a century or more old and still beautiful.
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