Amethyst is the crystal for the Crown and 3rd Eye Chakra. Wearing Amethyst protects one from all kinds of negative energies.
Amethyst is useful in insomnia and nightmares. It is an extremely powerful stone for meditation, and meditating with Amethyst reduces anger, stress, and depression.
It is also a stone which can be used for de-addiction. Hold Amethyst in your hand while meditating to activate the 3rd Eye.
For students and education, Amethyst is useful. It improves concentration and helps students in studies.
It is also a crystal to strengthen the immune system. You can carry Amethyst in your pocket while going for court cases.