I pick up quartz pebbles whenever I come across them in the wild, usually from the local river in dog walks. These two are exceptionally white for being from the River Clyde. Usually the quartz here is stained orange, red, or yellow, by the rich iron oxides in the soil. These two pieces were a nice find.

These quartz pebbles have been through about six weeks of polishing to make them shiny. They came out well.