Video: Why seashells are tougher than chalk

Why seashells are tougher than chalk (video)
Credit: The American Chemical Society

Seashells are made mostly of calcium carbonate, also known as chalk, a mineral soft and crumbly enough to use for sidewalk doodles.

Yet seashells are tough and resilient.

In this video, Reactions explains why seashells are so different, and why you can't use them to draw on your driveway:


Explore further

Mechanical engineer's method to control growth of carbonate-based crystals featured in PNAS

Citation: Video: Why seashells are tougher than chalk (2018, June 7) retrieved 21 April 2019 from https://phys.org/news/2018-06-video-seashells-tougher-chalk.html
This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only.
3 shares

Feedback to editors

User comments

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more