... and blue 3. high intensity, smooth surface,more cleansing Luminous Ceramic Pebbles 1.Material: ceramics and photoluminescent pigment.2.Afterglow time ... area. It can be used in footpaths, gardens, rockeries, pebble paths, terrazzo concrete, driveways and so on. Spreading around the ... .5cmAverage Weight8g, 20g, 28gShapePebble, Cobble, triangleWater ResistantYesUV ResistantYes Luminous Ceramic Pebbles