Buddhism believes that Buddhist relics are treasures that people can get through practice, and generally only appear after Taoist priests and monks are cremated. Therefore, in Buddhism, the relic is something that all believers yearn for and respect. No matter where Buddhism is, its followers believe that Buddhist relics are related to personal spiritual merits. But modern science denies the existence of theology, but modern science can't explain why, so some people still believe in theology.
Some people say that the relics are related to the eating habits of monks. We all know that monks basically eat vegetarian food, and it is very likely that crystals will form in their bodies after a long time. However, some people are not satisfied with this explanation. They say that if you eat vegetarian food, you can cremate your relics after you die. That's what people do. If everyone can get the relic, it is not a sacred object that people yearn for and respect. Later, there were more strange statements, but there was no clear and unified statement about how the relic was formed.
In fact, we only need to treat people and things around us with piety and friendliness, and what we yearn for is not so far away from us.