Marquise Tiara Band - 14k Gold & White DiamondsDetails 0. 28ctw white diamonds set in recycled 14k yellow, rose, or white gold. Description The Marquise Tiaras crowning jewel is, in fact, its central feature the namesake marquise shaped stone. The delicate arc is made by three graduated round diamonds at either side, making for quite the statement nesting band or the regal addition to any engagement ring be it round, oval, emerald or pear in shape.