Jacques Guay · Madame la Marquise de Pompadour

Jacques Guay (1711–1793) was a French gemstone engraver born in Marseille who became the preeminent practitioner of his art in 18th-century France. He specialized in cameos and intaglios carved into semi-precious stones such as onyx, jasper, and carnelian, often depicting historical subjects and figures from the reign of Louis XV. Guay rose to prominence as the official engraver to the king (*graveur du roi*) in 1745, receiving lodgings in the Louvre, and in 1747 he became the first gemstone engraver admitted to the Académie royale de peinture et de sculpture.

A protégé of Madame de Pompadour, mistress of Louis XV, Guay benefited from her patronage after returning to France. She installed him in her apartments at Versailles and commissioned him to create gem engravings commemorating key events and personalities of the era. In turn, Guay taught Pompadour the techniques of gem engraving, enabling her to produce her own works in onyx and similar stones. Their collaboration extended to printmaking: drawings after Guay’s carved gems—often by François Boucher—were etched by Pompadour herself, resulting in a celebrated series of 52 prints published as the *Suite d’Estampes Gravées Par Madame la Marquise de Pompadour d’Apres les Pierres Gravées de Guay*.

Guay’s refined technique and court connections secured his reputation as the leading gem engraver of his generation. His works adorned royal and aristocratic collections, and a portrait of Madame de Pompadour at her toilette famously shows her wearing one of his cameos of Louis XV. Though details of his early training remain limited, his mastery placed him firmly within the Rococo tradition of elegant, narrative luxury arts favored at Versailles.

Guay’s legacy endures through surviving gems, the prints produced in collaboration with Pompadour, and his role in elevating gem engraving to academic recognition. His influence on both royal patronage and Pompadour’s own artistic pursuits highlights the interconnected world of 18th-century French court art.