possibly salt if on the beach, just strikes me as being caused by some process affected by some diluted mineral in water over a length of time. could be way off the mark though.
so have you decided if you like the photo yet? don't let my comment sway your decision.
hmmmm... idk just my personal preferences I guess, that is an interesting rock though. is that line natural, maybe calcium build up from sitting in water for some time?
yeah found it on the beach like that. don't know if it's calcium build up it was quite a different material compared to the surrounding rock. i find a lot of rocks on the beach made of the same material as the streak... it's kinda sparkly... reminds me of granite for some reason
so have you decided if you like the photo yet? don't let my comment sway your decision.
and i actually tried to leave it without a lot of contrast
here's an original from the photos of that rock: [link]