"Black Basalt is becoming increasingly popular. This volcanic rock is a durable stone, perfect for paths and general decorative landscaping. This larger variation of the Black Basalt is ideal for driveways as the stones are less likely to move. The bold colours of the stone can add a real contemporary look to any garden. The stone is perfect for making a bold statement in your garden and adding the wow factor. Due to the durability of this stone it will remain looking beautiful in your garden for many years. The Black Basalt 20mm is a naturally quarried product which may result in slight variations in formation, size, colour or shape."