Melanophlogite
Fortullino, Rosignano Marittimo, Livorno Province, Tuscany, Italy
Reflections, refractions, and caustics are native in the photo and have no post-processing (other than contrast and crop).
Canon 550d,bellows,Amscope achro planar 4x, Helicon Focus 7, Gimp 2.10.6
© Gianandrea Ghirri