Rosettes are floral depictions built up out of several diamonds. They were used to make the most out of small stones, grouping them together to make larger-looking gems. Rosettes were en vogue during the 15th and early 16th century after which they lost their popularity. Take a look at these images. The painted illustrations of mid-16th-century jewels depict rosettes of diamonds and rubies. The round one is set with three Rosettes, one made of rubies and two diamond ones on either side of the fleur de lis. The black and white illustration is a diagram depicting the way these rosettes are built up out of five separate diamonds, purposely cut to form a five-petaled rosette when combined.