Amethyst is a type of quartz crystal. In history, Egyptians used amulets of amethyst to induce dreams and visions. Amethyst, being purple, is associated with the Crown chakra which brings about your spiritual consciousness. It is able to control harmful behaviors, sharpen the mind, increase memory, alleviate emotional sensitivity, and strengthen the immune system. It calms an overly passionate nature and also absorbs negativity from the environment.
Amethyst is versatile in that it can heal physical, emotional and mental illnesses.
The second stone pictured on the page is Clear Quartz . Clear quartz is what your typical crystal ball is made of. Clear quartz is so versatile that almost every spiritual practitioner, including every field from Shamans to New-Age healers, have a clear quartz crystal in their medicine pouch. This stone amplifies the energy of other stones. It also accelerates the healing process, removes energy blockages, aids the nervous system, brings one back into contact with themselves, and helps just about everything else imaginable.