AR stands for Joel Arthur Rosenthal, the master jeweler born in 1943 in New York. In 1977, he founded the house of JAR, one of the most exclusive high-jewelry houses in the world. Based on Place Vendôme in Paris, JAR avoids mass commercialization, crafting extraordinary, unique pieces often made on commission. JAR's creations combine rare and sometimes exotic gemstones with non-traditional materials. As a master of color, Rosenthal creates original jewelry inspired by nature and botany camellias, pansies, and ivy are transformed into exquisite, one-of-a-kind pieces.

JAR pushes the boundaries of jewelry design, meticulously sculpting pieces that have become iconic. A master of the pavé technique, Rosenthal sets gemstones so closely together that they appear to fuse, creating a uniform and dazzling surface. JAR jewelry is admired and collected for its unique designs, each piece akin to a work of art.