FACTS ABOUT CRYSTAL REVEALED

These crystals were fashioned over one million years in the past inside the Earth's crust. They manifest if the liquid in the Earth consolidates along with the temperature chills. Other crystals sort in the event the liquid can make its way in the clefts and dispense minerals in the clefts.①压电效�?在机械力(压力或拉�?作用下，æ°