Required. The magnetic field of crystal will absorb some bad magnetic fields in the human body, and its absorption capacity will fail after long-term use, so Himalayan crystal needs to be demagnetized. Crystals can be placed in crystal caves or crystal clusters to purify the magnetic fields in crystal caves and crystal clusters that require degaussing. If conditions permit, you can purchase a crystal cave or buy some broken crystals to form a crystal cluster, which will need to be degaussed. Crystals are placed in crystal caves or crystal clusters. There is a stable energy cycle in crystal caves and crystal clusters. The energy of crystals that need to be degaussed will also circulate, thereby eliminating negative energy.