Whose refraction effect may be discoloration? If it is really damaged, it is generally not repaired. You can go to the jewelry store for consultation, or you can go to the place where you buy crystals. I just checked the information again. Please have a look.
(2) Low temperature purification method: This is the most controversial purification method at present. Because crystal is a kind of high-density gem, and there are usually ice cracks in it, it will become extremely fragile after passing through the freezer with sub-zero temperature. In particular, most pendants have some crystal pendants similar to gold and silver ornaments. Because of the different ductility of ore and metal, the combination of holes may loosen due to the change of temperature difference. In addition, don't flush the crystal directly after putting it in the freezer overnight, because it needs to be worn immediately, which will lead to the danger of bursting. Therefore, it is the most correct way to release the temperature slowly and naturally by means of low-temperature purification. Let's look at the method. Before sending it into the freezer, seal the crystal with a fresh-keeping sealed bag or plastic wrap (to prevent the smell of other food from getting on the crystal), and put the crystal in the refrigerator for one night to achieve the purification effect.