Silver Grey Granite Flammed Setts are directly imported from China which are cut by Machine & Top is flammed. When dry the product is more of a Lighter shade but when wet it gives you a grey look as seen in the pictures. 
 
An ideal application would be for courtyards, driveways, paths and patios, when laid on an adequate sub-base and mortar bed. In the UK, this material is named as mid grey granite & blue black granite. These are  original G603 Chinese granite cobbles.