Cartier Art Deco Cabochon Sapphire and Diamond Stick Pin in Platinum by Georges Andrey

Art Deco Cartier Deep Blue Sapphire with Geometric Diamond Accents

This antique Art Deco Cartier New York sapphire and diamond stick pin, crafted in platinum by Georges Andrey, combines a blue cabochon sapphire with two rectangular step-cut diamonds. Its balanced gemstone arrangement brings together rich color, softly rounded contours and crisp diamond facets.

The blue cabochon sapphire forms the centerpiece. Its rectangular outline, curved corners and polished dome give the stone a strong visual presence. Light moves across its smooth surface, creating reflections that contrast with the sharply defined facets of the diamonds.

Positioned on either side of the sapphire, the two rectangular step-cut diamonds create a symmetrical frame. Their elongated facets introduce flashes of light beside the deeper blue center, while their individual rectangular settings reinforce the clean lines of the composition. The close arrangement keeps attention on the relationship between the three gemstones.

The platinum setting provides a cool white surround that complements both the sapphire and the diamonds. Corner prongs secure the center stone, leaving its domed surface prominently displayed. A slender pin shaft completes the design, giving the jeweled head a restrained and elegant foundation.

Cartier Signature and French Hallmarks

The pin bears the Cartier New York signature, together with a French platinum hallmark and the GA maker’s stamp of Georges Andrey. These marks identify the jewelry house, the precious metal and the workshop responsible for its manufacture.

The signature and stamps are illustrated in the accompanying close-up photographs, allowing the pin’s identifying marks to be examined alongside its gemstone settings and construction.

Collector’s Note

For collectors of Art Deco Cartier jewelry, an identifiable workshop mark adds interest beyond the house signature. Here, the Georges Andrey GA stamp provides an additional point of reference for understanding the jewel’s craftsmanship.

The pin’s deep blue sapphire, symmetrical diamond arrangement and platinum setting bring together distinctive elements of its Art Deco design. Its compact proportions and combination of house signature, French platinum hallmark and maker’s stamp make it an appealing addition to a collection of signed antique jewelry.

Styling Note

This Art Deco sapphire and diamond stick pin brings a concentrated touch of blue to tailored clothing. Worn on a jacket lapel or with a tie, it complements navy, charcoal and lighter neutral fabrics.

The polished sapphire adds richness, while the diamond accents introduce light and definition. Its compact jeweled head offers a refined accent for someone who appreciates expressive gemstones and distinctive antique accessories.

Key Features

• Jewelry house: Cartier
• Maker: Georges Andrey
• Period: Art Deco
• Metal: Platinum
• Center gemstone: Blue cabochon sapphire
• Diamond accents: Two rectangular step-cut diamonds
• Design: Sapphire-centered head with symmetrical diamond accents
• Jewelry type: Antique stick pin
• House signature: Cartier New York
• Metal hallmark: French platinum hallmark
• Maker’s mark: GA stamp of Georges Andrey

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