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Eggshell structure, varies widely among species, is a protein matrix lined with mineral crystals, usually of a calcium compound such as calcium carbonate . It is calcium build-up and is not made of cells.

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17y ago

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Depends on the breed of chicken. Some lay white, brown or other colors. Again, it depends on the chicken.

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Wiki User

15y ago
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It has an unborn chicken in it. And egg yolk and egg white as well...

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Wiki User

10y ago
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calcium

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Wiki User

12y ago
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Calcium Sulfate

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Anonymous

4y ago
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Q: What is egg shell made of?
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