This crystal changes from clear to pink/red. Or from red/pink to clear. You do not need to touch it: the change can be done in the hand of the participant, or on the table.
This can be used as a visual representation of thought-transfer, a spirit entering a room, transfer of energy, removal of demons, hallucinations, etc. It is a mystical object intended for use in demonstrations of real power, not for mere entertainment or eye candy.
Each set comes with 2 crystals, a PDF, and an audio program with ideas, applications, performance tips, alternate methods, and seance methods.
The video below shows the change from clear to pink, and as you will see, it is a gradual change. The video quality does not do it justice – the end color is much more vibrant and visible.
There is a restriction for this – fortunately, there are ways of getting around it, and those are detailed in the audio program.