Model of a coccolith of the phytoplankton Emiliania huxleyi type A, a calcareous alga, based on scanning electron microscope photos.
Size: 43.5 x 38.7mm x 10.7mm, 0.41 x 0.44 x 0.42 inches
Scale: ∼ 1:7000, diameter Coccolith ∼ 6 µm
At one tip there is a small ring with a ∼ 3mm hole to pull a fine necklace or string through.
More information about this faszinating cell:
https://en.wikipedia.org/wiki/Coccolith
https://en.wikipedia.org/wiki/Emiliania_huxleyi
About this on my website:
https://sonnenschauer.net/en/portfolio-2/emiliania-huxleyi-2/