Valli Coloured Calcium Carbonate and Valli Coloured Dolomite are natural aggregates, rinsed, dried, and then artificially coloured.

The dyeing process uses pure pigments, natural oxides and synthetic resins, which give the granule a high resistance to water and light. Valli Granulati has an archive of over 1500 colours and is capable of producing endless customised colours, in several grain sizes.

Valli Coloured Calcium Carbonate and Valli Coloured Dolomite are used in the following fields: wall cladding, locations for events, showcases decoration, aquariums and decoration. They are completely non-toxic sands, obtained with a process that does not alter the pH values and are perfectly compatible with plants and animals.