Amethyst is the crystal for Crown and 3rd Eye Chakra. Putting Amethyst protects one from all kinds of negative energies. Amethyst is useful in insomnia and nightmares. It is an extremely powerful stone for meditations and meditating with amethyst reduces anger, stress, and depression. It is also a stone that can be used for de-addiction. Hold Amethyst in your hand while meditating to activate the 3rd eye. For students and educators, amethyst is useful. It is also a crystal to strengthen the immune system.