Types

• Sapphire changes color in different light.Image by Flickr.com, courtesy of Cliff
  
  Alexandrite, diaspore, sapphire, garnet and spinel are known to change color when acted upon by light of particular length, color and intensity.
  
  

Function

• Healing stones are believed to conduct energy.Image by Flickr.com, courtesy of Kevin Dooley
  
  Crystal healers believe that certain stones conduct energy from a healer to another body. When energy is amplified or conducted through the stone, the stone might change color.
  
  

Features

• Human energy is believed to bring color change.Image by Flickr.com, courtesy of Matthew
  
  Certain crystals are energy conductors that can register a wide range of vibrations, including electricity, magnetism and sound. Various frequencies might incite color changes.
  
  

Potential

• Opals and other fragile stones change color easily.Image by Flickr.com, courtesy of Cliff
  
  Opals are considered powerful healing stones believed to spark the imagination and absorb thoughts and emotions. Like other fragile stones, opals can change color with exposure to heat, salt or intense energy.
  
  

Prevention/Solution

• Crystals can be cleansed with salt.Image by Flickr.com, courtesy of Kevin Dooley
  
  It is said that crystals are subject to physical and energetic damage and imbalances and can get "tired" from too much use. Crystal healers believe that tired crystals can be enlivened and cleansed with salt, sound and even moonlight.