Dirty Yaks Red Marble Whiskey Stones Dirty Yak's Whiskey Rocks are designed to chill fine spirits and wines without diluting the complex flavors of your favorite drink. Currently available in Red Marble, White Marble and traditional Soapstone. The Marble stones have rounded edges to prevent scratching glass. Soapstone is a softer stone and will not scratch glass. Simply rinse, chill in freezer for a few hours and enjoy a chilled glass of your favorite beverage without any dilution.. Box contains nine stones and a velvet bag for freezer storage.