Our two-piece set of hand-crafted Rainbow Quartz Whisky cubes are designed to keep your drink cool for up to an hour without diluting your drink like regular ice cubes. Simply place the set of gems in the freezer for roughly 4 hours to chill, and add to your glass as needed. Rainbow Quartz has earned its title due to the variations of colour that run through the crystal. The crystal is known for some of its grounding spiritual properties which relieve stress and anxiety and encourage calmness. The perfect gift for cocktail enthusiasts or those who simply want to add a touch of sparkle to their in-home bars. Cube Dimensions: 2 x 2 x2cm.