Oscar Massin was a renowned Belgium jeweller who worked in Place Vendôme during the 19th century, where he was praised for his fabulous designs and impecable craftsmanship. In 1867, he was awarded the gold medal at the Universal Exhibition in Paris. His name, forgotten after his death in 1913, was brought back to light when investors revived the brand in 2022 with new jewels featuring climate-neutral, lab-grown Latitude Diamonds produced by WD Diamonds, based in the Washington, D.C. area.