Answer

In McFengshui, rose quartz is used to commit fraud through the use of outlandish claims for its abilities.

In real feng shui the stone has no use, just as other stones have no use in feng shui — unless we are talking about half-ton boulders being used to alter a microclimate.

Quartz is known for its piezoelectric effect (the stone becomes electrically charged when bent or stressed in certain directions), which makes it useful in radios, liquid crystal displays on watches, televisions, and computer screens.