I ordered two 800 kg bags of Flamengo 20mm gravel. The delivery was excellent and the driver was very helpful. However, the gravel was so covered in white sludgy powder it seemed to be the wrong product. Examination proved it to be correct, but covered with a hugely excessive amount of white powder. This product had clearly not been washed. While some dust is inevitable, the photo below shows the amount of sludge separated from one bag by a cursory washing. Once cleaned, the gravel is very satisfactory, but a lot of excess work has been required to achieve this.