It was originally posted at https://www.photomacrography.net/forum/viewtopic.php?t=44689 (image #4 of that thread).
We're reproducing the image here, separately, as part of our procedure to provide clarity when the front page shows one image from a larger collection.
Please discuss in its original thread, with cross-references as needed. Thanks!
--Rik
Crystalized melt of sulfur (John Hart)