Assertion: black tourmaline | /r/CapableOf | relieve the pain of arthritis
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Source sentences:
text: Physically, green tourmaline helps strengthen the immune system, black tourmaline relieves the pain of arthritis as well as aches in the feet, ankles, legs and back, red tourmaline helps the heart, circulation and reproductive system, blue tourmaline is helpful with the throat area while pink tourmaline can help with relief from heart problems.