Chakra set usually contain group of healing crystal each with its own healing properties.
There are seven major chakras in our bodies and each chakra has their individual color stone and vibration.
Each healing crystal of specific color will heal their respective chakra.
The body layout and diagram often comes with the kit.
They explain how to position your body and place the crystal in alignment with the chakras.
They require the user to lie in a comfortable position and place the crystals and let the energy of crystal do their work.