Exstrom Laboratories LLC
All images in the Microscopy Picture of the Day are licensed under the
Creative Commons Attribution 4.0 International License.
Here is Colorado river rock with hematite inclusions. A 0.5 mm diameter pencil lead is shown on the right for scale. Hematite is the main ore of iron.
Equipment used: Canon EOS Rebel T5i with 49 mm long extension tube.