Hi. I found this rock in a lake and I would love to know what you think it is. The white looking part is like a shiny glass looking thing and its all over the rock when you shine light on it. :)
Looks like or agate or some leftovers from glass either natural or slags from some facility. I found something that also looks like the rock you describe. Found in a lake under a few builders. Colored white green blue gold like (probably sandstone) and very shiny. Layered like an agate.