What makes ice cubes cloudy?
Commercially made ice is stirred as it is being frozen and household ice is not. Without mixing, many more ice crystals form and air is trapped in the ice. Light rays are distorted by these crystals and this distortion gives home frozen ice a cloudy appearance. Dissolved minerals (calcium and magnesium) in the water also tend to settle out when the water freezes. You may notice these minerals floating in your glass when you use the ice cubes.
