Smith Test on Stone

Smith Test is carried out to find out the presence of soluble organic matter in the stone.


A small quantity of stone sample is taken and placed in a container. Then is filled in the container in such amount that all the stone samples immerse fully. After 2-3 hours the whole assembly is agitated vigorously.

Then the water in the container is observed. If the water becomes dirty, it indicates that stone contains soluble matter and if water remains clear it indicates that stone is free from soluble matter and quality of the stone is good and durable.

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