The phrase JAR style refers to the body of design and fabrication conventions developed by Joel Arthur Rosenthal at his Paris maison JAR from 1977 onward, and which through their broad adoption have become one of the dominant idioms in twenty-first-century independent fine jewellery. The style is recognisable across multiple subjects and forms and is characterised by a small number of consistent commitments that distinguish it from earlier haute joaillerie traditions and from the production of the major Place Vendôme houses.

Defining Features

The first signature of the JAR style is the use of patinated dark metal as a mounting. Silver patinated black, sometimes over an underlying gold core, replaces the bright platinum and white gold of mid-twentieth-century French haute joaillerie. The aesthetic logic is to remove the metal mounting from the eye, allowing the stones alone to register as colour and form.

The second is fine pavé in calibrated coloured stones with controlled tonal gradation across the surface of the piece. JAR pavé typically uses thousands of small stones graded across hue, saturation and tone to produce gradations that are continuous rather than banded.

The third is asymmetric naturalism. JAR's flower studies, butterflies and figural subjects are rendered with a deliberate eccentricity of pose and a refusal of the centred symmetrical composition that has dominated haute joaillerie since the nineteenth century. The Japonisme inheritance in this is sometimes noted by critics.

The fourth is the deliberate use of non-precious materials when these serve the design. Titanium, aluminium, bronze and copper alloys have all been used in JAR pieces alongside or in place of the conventional gold and platinum, on the principle that the right material is the one that achieves the visual effect.

Origin and Lineage

The JAR style draws on multiple historical sources. The Japonisme of the late nineteenth century, with its asymmetric naturalism and its acceptance of patinated dark metals, provides one direct precedent. The flower studies of René Lalique and the French Art Nouveau jewellers, with their loose botany and use of unconventional materials, provide another. The Indian and Persian jewellery traditions, with their dense pavé carpets of coloured stones, provide a third. JAR's particular synthesis of these sources, however, is distinct and recognisable as Rosenthal's own.

Influence

The JAR style has been adopted, adapted and sometimes openly imitated by a generation of independent fine jewellers worldwide. Hemmerle in Munich works in patinated copper and bronze with similar logic; Wallace Chan in Hong Kong has explored titanium and patinated metal in his own idiom; numerous smaller independents working in patinated alloys can be read as part of an extended JAR moment. The style has also influenced the major haute joaillerie houses, with patinated mountings and asymmetric flower studies appearing in their high-end production from the early 2000s onward.

Boundaries

It is important in the trade to distinguish work in the JAR style, which is fully legitimate as an independent design idiom, from work falsely attributed to JAR itself, which is not. JAR's reluctance to authenticate pieces and its limited public catalogue make provenance the decisive question for any piece claimed to be by the maison.