If you want to use the white crystal for energy therapy, meditation or other spiritual practice, you can continue to use it even if it has a broken corner. White crystal is considered to have a powerful purification function, which can remove negative energy and enhance positive energy. Even if it has cracks, it can still help you improve your attention and clarity of your mind.
However, if you want to use white crystal as jewelry or collection, then its integrity is very important. Because it may affect its market value or appearance. In this case, it is recommended that you seek the advice of a professional jeweler or restorer to see whether the restoration is feasible or whether there are other alternatives.
Most importantly, you need to make a decision according to your actual situation and feelings. If this white crystal has a special meaning to you, you can continue to treasure it even if it has a broken horn.