Optimization refers to various improvement methods to show the potential beauty of gems. Common optimization methods include heat treatment of all gems except jadeite, bleaching of all gems except jadeite, waxing of all gems except turquoise, chalcedony and agate dyeing. Why except jade? Because the heat treatment of jadeite produces red and yellow is the optimization of jadeite.
Optimization has no influence on the essence of jewelry and jade, and does not change its original properties, so the name of the gem is directly used when naming, and it does not need to be indicated in the gem appraisal certificate, which means that "optimization" can be omitted in the gem appraisal certificate, so friends who care about this should discuss with the merchant before buying.