Cubic Zirconia has a long history. It is a man-made composition to simulate the Diamond. Due to a hardness of 8.5 and modern technical advances Cubic Zirconia has become a high quality, inexpensive, beautiful gemstone. The cubic zirconia heart shape is one of the most popular products in the jewelry industry. Our cubic zirconia amethyst hearts are very beautiful. We have many shapes: ROUND, OVAL, OCTAGON, SQUARE, MARQUISE, PEAR, TRILLION