The Diamond Briolette Diamond Briolettes are a form of rose cut diamonds dating back to the era of the Mogul Dynasty. An example of a very famous Briolette, The Black Star of India, is shown in the photo on the right. The Briolette cut diamond reflects the light at many angles producing a rippling waterfall effect. Its facets are all triangular in shape entirely covering the circular cross section of the stone. Channel light, cool and clear, fiery as the sun, these diamonds are much desired. They always enhance jewelry in which they are used. In the 1800s briolette cut diamonds were set into Russian tiaras called Spartan diadems. Here in the United States, the Briolette gained popularity in the 1930s and is once again enjoying a resurgence. We at Sadie & Co. are very excited about the briolette diamond cut. It is difficult to visualize its beauty until you see the sun light rippling through its facets.