Our product range includes nearly 25 minerals available as gravel & pebbles in a wide variety of standard grain sizes, i.e. from 2/4 to 60/120 mm; with the help of water, the crushed stones are processed in our drums in Malmedy into round gravel & pebbles that are re-sieved for sizing; they are in great demand to simulate natural sites (fountains, waterfalls, etc.) in a somewhat Zen and relaxing atmosphere.