You can read more about the crystal here >> Amethyst

Amethyst is considered to be a powerful protective stone which protects our energy field, eliminates stress and brings peace and harmony. It is also known to help with insomnia problems. Ancient nations named it a crystal of detoxification and sobriety. It balances mood swings and helps us achieve inner peace.

You can read more about the stone here >> Black tourmaline

Black tourmaline is a stone of grounding and protection. It removes blockages, disperses negative energy and increases mental vitality. It is especially recommended for protection against emotional vampires. We associate it with the first chakra as it grounds and stimulates the flow of energies between the chakras.