Whiskey Stones & Crystal Glass Gift Set - Reserve Tumbler (11.7oz)' Our solid rocks let you appreciate and rediscover . Fast cooling non diluting round solid granite stones used to perfectly cool fine spirits without watering down your drink. Trust an awarded leading brand, choose the Rocks Whiskey Chilling Stones. & Each Rock has a different color and granite style making every set unique and standout beautifully. While most stones on the market are cheap soap basalt stones, we offer top of the line solid & premium