This class of stones use oil as a lubricant to keep the fine metal particles generated by the sharpening process from embedding into the surface of the stone. The metal particles are kept in solution and as a result do not “clog” or “glaze” the surface rendering it ineffective. Clogging is a potential problem with all stones.
Manufactured oil stones are most commonly made from either silicon-carbide or aluminum-oxide. Natural oil stones are usually referred to as Arkansas stones.
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