A beautiful, angular, marble white Gravel 10 – 20mm is a classic favorite for paths, driveways and walkways as it settles flat and wears well and gives a bright and professional looks. This gravel is also known as Marble Crush or Marble Gravel. For the best coverage it is best laid at 4-5cm deep. The actual size ranges between 10-20mm. An outstanding aggregates for price and quality.