Before technology was advanced, there were few tools design to cut and shine the diamonds. So, there were quite few shapes and layouts. But now, there are plenty of tools so diamonds are available in a number of shapes, sizes and designs to design the diamonds. Some of the most popular designs of diamonds are round, heart, pearl, glowing, princess, cushion and much more. Each contour can be found in a variety of sizes. These are utilized to make the most wonderful diamond rings.