Question

What kind of rock is used to make grinding stones ?
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Answer 1

Answer: Grinding stones are usually made from abrasive rocks such as sandstone or coarse-grained basalt or quartzite The stones are sometimes found upside down, with the grinding surface facing the ground to preserve it from the weather. Upper and lower grinding stones will not necessarily be found together

Explanation: IT IS BASALT

Answer 2

Answer:

Sandstone

Explanation:

Sandstone is a sedimentary rock which is used for making Grinding Stone, etc. types of stones.