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Professional natural stone Arkansas Black (Extra Fine) 2000-3000 grit without blank. It is perfect for sharpening in Edge Pro grinding systems, as well as for manual sharpening. The material from which Black Arkansas whetstones are made is sedimentary rock, has a uniform micro-grained structure of dark gray color with a dense, uniform texture. The dark color of the rock is uneven, there are transparent spots made of a material characteristic of a translucent, but they are not visually determined against a black background. The mineral composition of the rock includes up to 92% chalcedony and about 8% calcite. Chalcedony is represented by a fine-grained fraction with a particle size of about 5 microns and a conditional hardness on the Mohs scale up to 5.5. Inclusions of carbonate (dolomite) cover up to 8% of the working surface of the stone, they are much softer (3.5 on the Mohs scale) and an order of magnitude larger. Arkansas Black is designed for extra-fine sharpening of knives made of different steels. Works very clean. The stone is ideal for sharpening pocket, hunting, kitchen knives and tools of all sizes. A very finely working stone, in work it is not inferior to a translucent in anything. Producer Dan's’s Whetstone Country of origin USA Type Black stone Structure very dense Approximate grit 2000-3000 grit Use for extra fine finishing Material Novaculite Surface size 152x25x6mm Stone thickness 6mm Color Black
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