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Cartier A Diamond Crossover Ring

Cartier Paris

Signed Cartier Paris, numbered C13180
Size P ½ (UK), 8 (US), 57 (EU)

Of toi-et-moi design, each end set with a marquise-shaped diamond weighing approximately one carat, the bombé shoulders pavé-set with brilliant-cut diamonds, to a fluted shank.


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Silversmith Biography

Cartier is a French jewellery house founded in 1847 by Louis-Francois Cartier. The house's history started when Louis-Francois Cartier took over master-craftsman Adolphe Picard's atelier in Paris and began creating elegant jewellery recognisable for the use of platinum. The French aristocracy was soon enchanted by the fine jewellery, and Princess Mathilde, niece of Napoleon I, made her first purchase in 1856. Three years later, the Empress Eugenie joined the list of Cartier admirers, and in 1859, Cartier opened a boutique on the Boulevard des Italiens in Paris. In 1899, Alfred and his son Louis Cartier created the first fine wristwatch with diamonds. The piece was a great success, and that same year, 1899, a new Cartier boutique was inaugurated in Paris, at 13 Rue de la Paix, that would go on to become the hub of the house's expertise. Alfred’s third son remained behind in Paris to continue the growth of Cartier at home. His revolutionary ideas, such as using platinum in jewellery, earned Cartier the title of ‘Jeweller of Kings, King of Jewellers’ from King Edward VII. The celebrity endorsements didn’t stop there, with Louis’ friend Alberto Santos-Dumont commissioning a watch to wear while piloting his lighter-than-air dirigible. Santos-Dumont’s celebrity status made the wrist-worn watch, uncommon at the time, a must-have fashion accessory among men. A stint on the Western Front inspired Louis to design a watch based on the Renault FT tanks he’d seen in action, turning the profile of a war machine into something beautiful: the Cartier Tank, one of the brand’s most successful timepieces. A commission for the Pacha of Marrakech followed, a waterproof watch that could be worn while swimming. The canteen crown design became the publicly available Cartier Pasha, another icon of Cartier’s past. Perhaps Louis’ most iconic creation was the triple gold Trinity ring, woven in three filaments of red, white and yellow gold.


Rings of crossover design that centre on two main stones are often known as ‘toi et moi’, which simply means ‘you and me’. The symbolism is obvious (two lovers uniting), making it a popular choice for engagement rings.

One of the earliest recorded rings in this style was given by Napoleon Bonaparte to Josephine de Beauharnais to celebrate their engagement in 1795. As Empress Josephine she became arguably the single defining figure of European fashion in the first decade of the 19th century, which meant that the enduring popularity of this uniquely romantic ring design was guaranteed.

This inspired mid-century interpretation was made by Cartier Paris, who themselves were leaders in jewellery design throughout much of the 20th century. The paired marquise-shaped diamonds have subtle differences in cutting style – one is slighter older, one slightly newer, but they are beautifully matched for size and quality. From the sensuously domed arms pavé-set with glittering brilliant-cut diamonds to the ring shank, fluted like a classical column, the attention lavished on every minute aspect of this ring leaves no doubt as to the superb quality of its craftsmanship.

A Diamond Crossover Ring Reference: DT23119.1a