Our 20mm Alpine Black is tough durable marble gravel made from a mixture of our 20mm Black Basalt with 20mm Alpine Blue. 

This gives it that unique colouring blend which sparkles when wet making it a great modern choice to brighten up your drive, pathway, and garden borders.

*Please note that all products are natural/quarried materials so there could be a variation in colouring, size & shape. All sizes shown are estimated*

 This product is not fish friendly