ScienceAlert on Instagram: "Can you guess what this is under a microscope? It's chalk! Natural chalk, the stuff from cliffs, is made up of many, many ancient husks of ocean dwelling plankton!
![Shower Thoughts on X: "Get a tiny speck of chalk (Calcium Carbonate), put it in an electron microscope, and this is what you'll see. http://t.co/I4V2ALMVnc" / X Shower Thoughts on X: "Get a tiny speck of chalk (Calcium Carbonate), put it in an electron microscope, and this is what you'll see. http://t.co/I4V2ALMVnc" / X](https://pbs.twimg.com/media/BUh6MD_CcAEhOzv.jpg)
Shower Thoughts on X: "Get a tiny speck of chalk (Calcium Carbonate), put it in an electron microscope, and this is what you'll see. http://t.co/I4V2ALMVnc" / X
![A microscopic view of French Meudon chalk, part of the chalk downland of Northern Europe made from was ooze accumulating at the bottom of a great sea. Chalk was one of the A microscopic view of French Meudon chalk, part of the chalk downland of Northern Europe made from was ooze accumulating at the bottom of a great sea. Chalk was one of the](https://c8.alamy.com/comp/2ABN9M1/a-microscopic-view-of-french-meudon-chalk-part-of-the-chalk-downland-of-northern-europe-made-from-was-ooze-accumulating-at-the-bottom-of-a-great-sea-chalk-was-one-of-the-earliest-rocks-made-up-of-microscopic-particles-to-be-studied-under-the-microscope-when-it-was-found-to-be-composed-almost-entirely-of-coccoliths-their-shells-were-made-of-calcite-extracted-from-the-rich-seawater-as-they-died-a-substantial-layer-gradually-built-up-over-millions-of-years-and-through-the-weight-of-overlying-sediments-eventually-became-consolidated-into-rock-2ABN9M1.jpg)
A microscopic view of French Meudon chalk, part of the chalk downland of Northern Europe made from was ooze accumulating at the bottom of a great sea. Chalk was one of the
![Molecular Expressions Microscopy Primer: Specialized Microscopy Techniques - Polarized Light Microscopy Gallery - Chalk Molecular Expressions Microscopy Primer: Specialized Microscopy Techniques - Polarized Light Microscopy Gallery - Chalk](https://micro.magnet.fsu.edu/primer/techniques/polarized/gallery/images/chalksmall.jpg)
Molecular Expressions Microscopy Primer: Specialized Microscopy Techniques - Polarized Light Microscopy Gallery - Chalk
![microscopic images. on X: "some of the calcareous nanofossils that make up chalk: emiliania huxleyi and gephyrocapsa oceanica magnified 9,000x under the scanning electron microscope https://t.co/9cfiS2NAB1" / X microscopic images. on X: "some of the calcareous nanofossils that make up chalk: emiliania huxleyi and gephyrocapsa oceanica magnified 9,000x under the scanning electron microscope https://t.co/9cfiS2NAB1" / X](https://pbs.twimg.com/media/FDiBZlnWEAUFb9M.jpg)
microscopic images. on X: "some of the calcareous nanofossils that make up chalk: emiliania huxleyi and gephyrocapsa oceanica magnified 9,000x under the scanning electron microscope https://t.co/9cfiS2NAB1" / X
Chalk - If you put chalk under a powerful microscope—white cliffs of Dover type of chalk, not the modern blackboard variety—you will see something like this. Because it's not just a rock.
![Close up chalk is so round... Close up kosher salt just like a pyramid | Chalk, Things under a microscope, Natural philosophy Close up chalk is so round... Close up kosher salt just like a pyramid | Chalk, Things under a microscope, Natural philosophy](https://i.pinimg.com/originals/70/fa/9c/70fa9c5504250ef9b670cb2f099b7116.jpg)
Close up chalk is so round... Close up kosher salt just like a pyramid | Chalk, Things under a microscope, Natural philosophy
![Chalk under a microscope......if you ever wonder why i like using chalks to make pigments just look! Chalk under a microscope......if you ever wonder why i like using chalks to make pigments just look!](http://www.hunterdelves.com/uploads/4/5/8/0/4580351/natural-chalk-under-microscope_orig.jpg)
Chalk under a microscope......if you ever wonder why i like using chalks to make pigments just look!
![Microscopic Preparation Of Chalk - An Illustration Of The Encyclopedia Publishers Education, St Petersburg, Russian Empire, 1896 Stock Photo, Picture and Royalty Free Image. Image 14520699. Microscopic Preparation Of Chalk - An Illustration Of The Encyclopedia Publishers Education, St Petersburg, Russian Empire, 1896 Stock Photo, Picture and Royalty Free Image. Image 14520699.](https://previews.123rf.com/images/igorgolovniov/igorgolovniov1207/igorgolovniov120700808/14520699-microscopic-preparation-of-chalk-an-illustration-of-the-encyclopedia-publishers-education-st.jpg)