Harmonizers are two objects used together and made of different stones. The tradition of paired harmonizers comes from ancient Egypt and has been used by energy practitioners for centuries. A great tool to relieve stress, fatigue, headaches, increase energy, amplify mental clarity. Each set is hand-cut. Shungite stone may have mineral inclusions (light streaks, spots or veins) that are primarily pyrite or iron oxide that naturally occurs in Shungite. Because of its high carbon content your new Shungite tablet may shed some black residue on skin, clothing or other surfaces. This is normal and harmless. The residue can easily be washed off most surfaces. How to use - sit comfortably with legs uncrossed and hands on the knees - hold the darker SHUNGITE tablet (Yin) in your left hand - hold the steatite (Russian soapstone) tablet (Yang) in your right hand - close your eyes, relax for 7-10 minutes Size Shungite Tablet - 1.125” dia. Steatite Tablet - 1.125” dia.