To the majority of people, eggshells are simply trash. But for some people eggshells are a surprisingly useful resource.
A few fun FACTS about egg shells:● An egg shell is made of calcium carbonate, which is also the main ingredient in some antacids. Each medium sized egg shell has about 750-800 mgs of calcium.
● The shell makes up 9-12 percent of an egg’s total weight, and contains pores that allow oxygen in and carbon dioxide and moisture out.
● The shell color of an egg is representative of the breed of hen that produces the egg. White hens produce white eggs and brown hens produce brown eggs.