What gemstone is depicted in the Rolls-Royce logo’s double R?

No gemstone is depicted in the Rolls-Royce logo’s double R; the emblem is a monogram of the company founders’ initials.

The two interlocking or overlapping Rs stand for Charles Stewart Rolls and Frederick Henry Royce. Rolls was a motor-car entrepreneur and Royce was an engineer and manufacturer. They entered a business relationship in 1904, and Rolls-Royce Limited was established in 1906.

The monogram is commonly shown in white or silver lettering on a black field, although colors and materials vary by application. Its formal, restrained appearance is part of the marque’s identity and is separate from the Spirit of Ecstasy, the winged female figure used as a hood ornament.

A diamond-like outline may appear around some Rolls-Royce badges or model graphics, which can lead to the gemstone misconception. The central identity element is not a jewel but typography: the repeated initial of Rolls and Royce. The spelling of Royce’s surname is also important; the second R does not represent “Royal.”