The word is out
There are those that study / collect varieties of flint. As amber is reknown in the Baltic area so the banded flint of Poland is unique. Also high on the honerable mention list is Flint Ridge Ohio and Alibates quarry TX.
Complete identifiable inclusions in flint is very common, the banding itself is not the design of the creature...
Think of the best banded flint once being the consistency of toothpaste, slightly different densities will gel harder than the rest, and Like paint, outer areas will skim over first then subsequent movement will blend this into the main body...
The holy grail of flintery might be a complete Mossasaur in flint