Some Little-Known Facts About Eggshells:
1.) Eggshells are extremely durable. In alkaline environments they can last for hundreds of years.
2.) Eggshells can withstand temperatures of up to 750 Degrees Celsius. For comparison, the temperature of magma ranges between 600°C and 1600°C.
3.) Some flooring brands produce floor tiles by combining polymers and chicken eggshells.