Quern-stones are stone tools for hand grinding a wide variety of materials.
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This was the earliest type of rotary quern to appear in the British Isles.
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A stack of quern-stones for sale in a market in Haikou, Hainan, China.
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It is not easy to produce flour from a saddle quern with unmalted grain.
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A quern was discovered at Dunadd in Scotland which has a cross carved into the upper stone.
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A broken or disused quern therefore can be seen as symbolic of death.
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There are however, more surprising recorded uses of quern-stones.
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The best type of stone from which to manufacture quern-stones are igneous rocks such as basalt.
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The earliest forms of quern were the saddle and trough querns.
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More examples
A primitive stone mill for grinding corn by hand
(Querns) Quern-stones are stone tools for hand grinding a wide variety of materials. They were used in pairs. The lower, stationary, stone is called a quern, whilst the upper, mobile, stone is called a handstone. They were first used in the Neolithic to grind cereals into flour.
(2) -- a grinding apparatus consisting of two circular stones, the upper of which is turned by hand
A stone grinding surface for preparing grains and other plant foods and for grinding other materials.
A hand-turned grain mill. (Robin Goodfellow could be helpful with household chores or mischievous, as the mood took him.)