NPT StoneScapes® Touch of Glass TROPIC BLUE TOUCH OF GLASS 1/2 Tropics Blue Pebble Pool Finish .5 Parent Kit. StoneScapes Touch of Glass Tropics Blue creates a dark blue water color and is comprised of modified white Portland cement which has been colored with dark blue pigment, black, gold and white natural quartz pebble aggregates and abalone shell with Cobalt Blue and Ice Blue glass bead accents. The glass bead accents enhance the water color by adding additional pops of color and contrast that only colored glass bead can do. The beauty of this finish comes from the shade and color variations inherent in natural materials.