Zen's most striking feature is the colour; jet black when wet and dark grey when dry. Attractive yet durable with a subtle rippled texture is a contemporary look to any garden.

 Limestone is composed of the mineral calcite, and often contains fossils of shellfish that lived in shallow seas where it were formed. 

Impurities during formation, such as clay, sand, iron oxide and other materials cause the amazing colour variations available.

Zen Cobbles are perfect as a feature, stairs or capping.