Zirconia is a high quality, durable, hard and optically clear synthetic crystalline substance. It is a man-made material and usually colorless, but can be produced in a variety of different colors. Because of its great similarities to diamonds, zirconia is often used as an affordable diamond substitute. Swarovski started to cut zirconia, being the first company on the market to offer a machine-cut exponent of this synthetic stone. Ever since, Swarovski Zirconia has been known as the most precisely cut zirconia on the market, available in a wide variety of exquisite shapes, sizes, and colors.