Quarried by hand in small numbers, the Zulu Grey is a unique, indurated sedimentary rock formed over 200 million years ago in the late Permian Period in the province of Kwa Zulu-Natal, South Africa. The stone is quite hard, exceptionally strong and dense. The Zulu Grey whetstone is quarried for its ability to impart a smooth final shaving edge on Straight Razors, however it would be equally effective at finishing a wide variety of fine-bladed tools and instruments. The stone is of course a natural product and as such each hone has an inherently unique appearance. Colours of the whetstones range from Grey-Blue to Grey-Green with a fine speckled pattern on the face of the stone. Some of the hones may also have what appear to be orange swirls or stains – this is created by iron oxide present in the stone and is quite beautiful in appearance.