[Berlin_Freeper]

This reminds me of certain dark stones in NYC which have these sort of sparkles. Like subway steps. Just wondering if it is from the same impact effect.

[texas booster]

Certainly possible. Much of the building material in NYC cams from the Appalachians, so lots of hard rock there that may contain quartz crystals.

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.