Cubic Zirconia, also known as CZ, is a man-made composition created to simulate the diamond. Due to a hardness of 8.5 and thanks to modern technical advances, Cubic Zirconia has become a high quality, inexpensive, beautiful gemstone. Garnet cubic zirconias are one of the more unusual products in the jewelry industry and our octagon cut garnet cubic zirconias are in high demand because of their unique beauty. We have many shapes: ROUND, OVAL, SQUARE, MARQUISE, PEAR, HEART, TRILLION