Black tourmaline is highly praised for its ability to absorb negative energy. In this way, it is often charged as a protective stone to be worn or placed around the home. Being that Magick & Macabre Co. is run by paranormal researchers, we like to call it the "Paranormal Investigator Stone" as it is great  for protection on potentially dangerous paranormal investigations or ghost hunts.  
 
Tumbled crystals on an elastic cord, one side fits most.