This lovely purple amethyst heart measures 1” long, 1 2/8” wide, and weighs 8 grams. It has the most beautiful layers of purples. Ready to enjoy or inspire something of your own creation! Sacred Amethyst...a lovely variety of Quartz that contains manganese giving rise to its heavenly purple color. This stone is a 7 on MOHs hardness scale and can also have varying levels of iron in it, creating the range of purple colors that amethyst displays. Amethyst is the stone of inner peace and the birth stone of February. Rocks and minerals: the oldest storytellers.