Black tourmaline represents purification and the cleansing of the emotional body. In other words, the stone may rid the mind of any negative energies and thoughts like anxiety, anger & feelings of worthlessness. Known as the stone of protection it may also positively influence the following factors. 
-Promote a healthy mood
-Helps to detox from heavy metals and environmental pollutants
-Support weight loss and reduction of bloating
-Support a reduction of anxiety and stress
-Support disengaging obsessive behaviors
-Support a healthy immune system
-Improve of circulation
Size medium & lightweight.