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The Knife-grinder by Goya shows a man using a portable grindstone. A grindstone, also known as grinding stone, is a sharpening stone used for grinding or sharpening ferrous tools, used since ancient times. Tools are sharpened by the stone's abrasive qualities that remove material from the tool through friction in order to create a fine edge.
A metate (or mealing stone) is a type or variety of quern, a ground stone tool used for processing grain and seeds. In traditional Mesoamerican cultures, metates are typically used by women who would grind nixtamalized maize and other organic materials during food preparation (e.g., making tortillas ).
It is a traditional tool to grind grains. A jato consists of two round stones or discs. The lower stone is immovable, attached to the ground or floor in the house, and it has a spike or a piece of wood ( mānī , Nepali : मानी , Nepali pronunciation: [mani] ) fixed in the centre as an axle to keep the upper stone in place while grinding.
Metate, and mano. A Mano, a smooth hand-held stone, is used against a metate, typically a large stone with a depression or bowl.The movement of the Mano against the metate consists of a circular, rocking or chopping grinding motion using one or both hands.
Quern-stones are stone tools for hand-grinding a wide variety of materials, especially for various types of grains. They are used in pairs. The lower stationary stone of early examples is called a saddle quern, while the upper mobile stone is called a muller, rubber, or handstone. The upper stone was moved in a back-and-forth motion across the ...
Traditional grinding stone used for making chutney, dosa batter and idli batter, in India today. In archaeology , ground stone is a category of stone tool formed by the grinding of a coarse-grained tool stone , either purposely or incidentally.