In selecting a Stone for engineering work, the following characteristics should be looked into.
1.It should be strong, hard and durable to withstand the deteriorating action of rough weather.
2.It should have pleasing uniform colour and fined grained compact texture.
3.It should be remain unaffected by smoke and atmospheric acids.
4.It should be free from cracks, cavities, flaws, decay or patches of soft material.
5.The surface of a freshly broken stone should be sharp, clean and bright with uniformity of colour and texture.
6.The specific gravity of stone should not in any case be less than 2.7.
7.It should be crystalline and homogeneous structure.
8.It should not absorb more than 0.60percent of it's weight of water after 24hours of immersion.
9.It should be well seasoned.
10.It should be easily obtainable and economical.
11.It should stand fire well for sometime without serious injury.
12.It should be easily obtainable and economical.
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