Cartier Belle Époque Diamond Sapphire Circle Stick Pin by Henri Picq
Cartier Platinum Gold Diamond & Sapphire Circle Stick Pin by Henri Picq, c. 1905–1915
An exceptional Belle Époque Cartier stick pin, crafted in platinum and attributed to the Parisian workshop of Henri Picq. Designed with a refined double-sided circular motif, set with diamonds on one side and sapphires on the other.
This remarkable Cartier stick pin was created during the Belle Époque, a period celebrated for its refinement, technical innovation, and artistic restraint. Crafted in platinum — the preferred metal of the era for its strength and delicacy — the piece reflects the airy elegance and precision that defined early 20th-century French jewelry.
The circular motif is perfectly balanced and finely executed, embodying the sophisticated geometry that emerged at the turn of the century. The use of platinum allowed jewelers to create light yet durable mountings, enhancing the brilliance of the gemstones while maintaining structural finesse.
Attributed to the esteemed Parisian workshop of Henri Picq, a known supplier to leading houses including Cartier, this piece carries both artistic and historical significance. Picq’s atelier was recognized for its meticulous craftsmanship and technical excellence, producing jewels of the highest standard for prestigious maisons.
Most distinctive is its double-sided construction. One face is set with shimmering diamonds, offering radiance and luminosity. The reverse is adorned with richly colored sapphires, creating a refined contrast and allowing the wearer to alternate between two elegant expressions. Such reversible designs reflect the discreet luxury appreciated by Belle Époque clientele.
This jewel stands as a testament to the collaborative brilliance between Cartier and one of its finest workshop craftsmen, representing a rare and highly collectible example of French high jewelry from one of the most elegant periods in design history.
Key Features
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Maker: Cartier
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Workshop Attribution: Henri Picq (H.P. hallmark)
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Period: Belle Époque, circa 1905–1915
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Metal: 18K Gold (French eagle’s head hallmark)
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Gemstones:
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One side set with diamonds
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Reverse set with sapphires
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Design: Double-sided circular motif
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Hallmarks:
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French eagle’s head for 18K gold (750/1000)
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Maker’s mark “H.P.” for Henri Picq
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Origin: France
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Category: Fine Stick Pin / Lapel Pin
Why This Piece Matters
Jewelry bearing both a Cartier signature and the workshop mark of Henri Picq represents an important chapter in early 20th-century French high jewelry production. The combination of Belle Époque elegance, platinum craftsmanship, and reversible gemstone design makes this stick pin not only aesthetically refined, but historically significant.
A distinguished addition to any serious collection of Cartier or Belle Époque jewels.
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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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