White Gravel 20mm Bulk Bag, 44% OFF pinnaxis.com Decorative Pebbles Gravels & Rock Lawnton Landscaping Tumbled Sandstone 20mm Price Tonne Centenary Landscaping Deco Pak White Limestone 20mm Decorative Stone Bulk Bag One Garden Utopia 20mm Melbourne BGS. Our 20mm Nambucca river stone blend features a mix of beautifully rounded river pebbles in hues of white, cream and blue and some assorted beach shells. This makes it a great choice for those with a home that exudes Beach Boho or a backyard with a more tropical look. Not only is our Nambucca an attractive stone, it is also very soft underfoot, making it a great option for pathways. Nambucca River Stone Benefits Perfectly smooth and rounded Washed and screened Naturally river worn Can be used indoors and outdoors Great for pathways, patios, garden beds and pots Looking for bulk? Our Nambucca Oversize is still available in bulk quantities.