Amethyst is a precious gemstone that belongs to the only purple member of the crystal family. Its mysterious romantic color makes it one of the most beautiful and noble crystals. Amethyst is composed of silica, dichroic, viewed from different angles, can show blue or red purple tones. Naturally produced amethyst, due to iron, manganese and other minerals to form a beautiful purple. The color of Amethyst can be deep purple to lavender,often the color is not uniform, there are color bands or spots, which is a characteristic of natural amethyst crystals.