Cartier Art Deco Diamond Stick Pin by Georges Andrey
Black Onyx and Diamond Contrast in Platinum and 18K Gold
This Art Deco Cartier Paris diamond and black onyx stick pin, made by Georges Andrey in platinum and 18K gold, combines a polished onyx circle with diamond-set accents and a square diamond setting positioned below. Signed Cartier Paris and numbered 0279, the jewel brings together contrasting colors, distinct shapes and finely detailed settings.
The black onyx circle forms the central element of the design. Its smooth, reflective surface creates a strong dark outline around an open center, giving the jeweled head a clear and recognizable silhouette. Against this polished black surface, the diamonds introduce brightness and intricate texture.
Two elongated diamond-set elements cross the upper and lower portions of the onyx circle. Their placement establishes a vertical rhythm through the composition, while their softly rounded outlines complement the circular stone. The white platinum settings provide a crisp surround for the diamonds and emphasize their contrast with the onyx.
Below the circle, a diamond in a square setting turned on point completes the arrangement. Its angular outline introduces another shape into the design, balancing the rounded onyx and elongated accents above. Fine beaded borders add detail to the settings, rewarding close inspection without interrupting the overall composition.
The 18K gold pin shaft adds a warm metal tone behind the cool platinum, diamonds and black onyx. Together, these materials give the stick pin a distinctive presence: rich in contrast, yet compact enough to wear as a considered accent.
Cartier Signature and Number
The pin bears the Cartier Paris signature and the number 0279. These identifying details complement its attribution to Georges Andrey, adding interest for collectors who appreciate both the jewelry house and the maker behind the piece.
Collector’s Note
For collectors of Art Deco Cartier jewelry, this stick pin offers an appealing combination of signed manufacture and a distinctive gemstone arrangement. Its composition brings together a circle, elongated diamond accents and a square setting, making the relationship between shapes an essential part of the design.
The combination of black onyx, diamonds, platinum and gold gives the jewel a strong visual identity. It is a compelling choice for a collection focused on antique stick pins, Cartier workshop craftsmanship or the contrasting materials of Art Deco jewelry.
Styling Note
This Cartier diamond and onyx stick pin makes an expressive accent on a jacket lapel or tie. Its black-and-white palette pairs naturally with charcoal, navy, cream and patterned tailoring, while the gold shaft introduces a subtle touch of warmth.
Worn on its own, the jeweled head provides a focal point without requiring additional accessories. Its distinctive arrangement offers a way to bring antique jewelry into contemporary dressing.
Key Features
- Jewelry house: Cartier
- Maker: Georges Andrey
- Period: Art Deco
- Metal: Platinum and 18K gold
- Gemstones: Diamonds and black onyx
- Onyx design: Polished circular onyx element with an open center
- Diamond arrangement: Two elongated diamond-set accents and a lower square setting turned on point
- Jewelry type: Stick pin
- Signature: Cartier Paris
- Serial number: 0279
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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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