What is not optimized is the old wax with skin, and the finger has a pinch of loose fragrance. The optimized wax will be coated with an artificial coating for beauty! Cracks actually have little effect on it, because it is a natural amorphous gem, which is very collectible. What you mean by impurities is actually something like plants wrapped when it is formed. The technical term is air inclusion, and amber contains impurities in nine cases out of ten! Amber also has medicinal value, and it is of great benefit to wear it often.