Speckled Pebble tiles Sumba Speckle are one of the most spectacular models we produce. Each single pebble stone is carefully selected and hand-sorter according to color, size and shape in order to provide the highest quality pebble tile available.  That gives you the certainty, that every time you place your order, you receive the same product according to color, size and weight. Our Pebble Tiles support interlocking system which facilitates the installation. We use only non-toxic, environmentally safe glue.