Black Tourmaline

Chemical composition:
(Ca,K,Na,[])(Al,Fe,Li,Mg,Mn)3(Al,Cr, Fe,V)6 (BO3)3(Si,Al,B)6O18(OH,F)4

Protects against mobile phones, computers, and electromagnetic disturbance
Defends against debilitating disease, strengthen immune system

電氣石
能量巨大，是打通神經系統及促進氣血循環的寶石，它能消除疲勞、聚財富，同時可防咒。