<span>The best were found in ancient Egypt
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Explanation: because of the density of the ice, blue is the only color that is reflected off the surface, all other colors of light are absorbed
Alright look, I am not 100% sure, but I am going to try to help you the best I can. I personally think it's in government archives because it would have been stored away there and would most likely be preserved so people can learn about it and it's origins.