An eggshell is the hard outer covering of an egg, most commonly from a chicken egg.
What it is made of
- Mostly calcium carbonate (same material found in chalk and limestone)
- Contains tiny pores that let air and moisture pass through
What it does
- Protects the developing chick inside (in fertilized eggs)
- Keeps the egg’s contents safe from bacteria and damage
- Has a natural membrane inside for extra protection
Interesting uses
- Cooking: Crushed eggshells are sometimes added to broth or coffee to reduce bitterness or add calcium (though not very common)
- Gardening: Crushed shells are used as a natural calcium source for soil
- Cleaning: Slightly abrasive when crushed for scrubbing pots (mixed with soap)
Quick fact
A chicken eggshell is strong enough to hold weight when pressure is evenly distributed—despite being very thin.
If you meant something specific (like uses, nutrition, or how to crush it safely), tell me and I’ll tailor it.
