How to differentiate the ice is made from raw water and water that has been cooked..
Fisrt, easy going and contrast, from raw water ice is white because there are still a lot of gas trapped inside. Usually, ice made from raw water is ice block. Ice is clearly not good eat / drink, especially if the water was taken from contaminated water sources. It is very dangerous to us to drink/ eat it.
secondly is if ice made from tap water appears clear because escaping gas in the water when boiling process. Usually, this kind of ice called ice crystals. Now, the ice crystals are widely used, it is cube-shaped and hollow, hollow in the middle.
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