With most folks thinking that the Carolina Bays come from meteor impacts, no telling what else is in the region.
Impact zones seem common around the world.
“Certainly possible. Much of the building material in NYC cams from the Appalachians, so lots of hard rock there that may contain quartz crystals.”
The shiny stuff in Appalachian rocks is quartz, feldspar, mica and some garnet.
Never knew about the Carolina Bays so I’ll have to talk to my daughter-in-law and find out how close they are to son’s home. VERY COOL! I also loved going to my grandmother’s in NYC and climbing the marble steps to her apt. Walls lined with it, too. Most colonial homes in Bucks Cty PA sparkle, too. Amazing planet!