This is an energy amplifier and transmutation device...  The crystals correlate with the chakras.... Amethyst,  Lapis Lazulie, peridot, citine, carnelian, garnet, selenite to keep it clear and to call divine white light into your crown chakra.  Hold it in your hand. There are chakras in your hand. The energy will grow.  Carry it in your pocket. Sleep with it under your pillow, experiment with it.
My personal experience is to hold the piece in your hands. Take 7 deep breaths. Feel your crown chakra expand. Feel yourself balance out.
Benefits
Protect you from Negative Energy through Transmutation
Calm and Purify the Atmosphere
Support Healthier Relationships
Encourages Plant Growth
Raises Your Physical & Spiritual Vibration
Supports Sleep
Encourages Lucid Dreams
Creates a Healing Environment
May Help Fight EMF