Lazy Old Coot wrote:
I agree with you that white line is between the under side of the arch and the blue sky (in the first photo) and I don't see any way that it could have anything to do with some sort of lime leaching from the stone. It's not on the stone at all. It might have something to do with some sort of color misalignment on our monitors, but other than that I have no explanation. ...... Coot
The lines cover over two stones. Somebody scraped them there. They are on the stone. You guys are seeing anomalies that aren't there.