How are seashells made? - Woods Hole Oceanographic Institution

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One of the most striking features of our beaches is seashells. Their whorls, curves, and shiny iridescent insides are the remains of animals. But where do they come from?

Aperture, shell structure

Where does all of the calcium/carbonate from seashells go after they are thrown away or left on beaches? - Quora

Colorful sea shells set starfish and spiral Vector Image, Sea Shells

Creatures Build Thicker Shells as Ocean Chemistry Changes

How are seashells created? Or any other shell, such as a snail's or a turtle's?, Sea Shells

How Seashells Are Made

How are seashells made? - Woods Hole Oceanographic Institution

Seashell, Definition, Types, & Facts

Woods Hole Oceanographic Institution