Answer:
One of the main reasons we can see that ICE  is cloudy is the WATER you use to make ice. In water, there will be many impurities such as lime, calcium, fluoride, nitrate, magnesium and some other organic substances that are both beneficial and sometimes have a little effect on health. These substances, if observed with the naked eye, you will not be able to see.
When put in the refrigerator, these impurities are completely separated from pure water and the cooling process will start from the outside in, so these impurities are pushed to the center, creating a cloudy white color in the middle.
Ice cubes with a transparent color are frozen by cooled boiled water or bottled mineral water.