NPT GEMSTONE 1" x 1" Colors + Collection Glass Tile Gemstone Agata 107/751 1.075 SqFt Sheet 20 Sheets per Case. With the need to offer clients an ever more differentiated product, particularly for swimming pools, bathrooms and other wet areas, a mix made up of the colors collection with flashes of titanium has been developed, so it can be offered at a better added value. A mix of the colors plus series can give a pool a more attractive and lighter appearance