Amethyst is a semi-precious purple quartz that has been popular since primitive times. It is a secret beauty only found inside geodes and has a long association with mystic powers. The natural color of amethyst ranges from a light violet pink to a deep reddish purple. Experience every hue with Amethyst Blush Thinking Putty®. It starts out as a lovely dark lavender and becomes pretty in pink with just the heat of your hands.