The specific gravity of good building stones should be between 2.4 and 2.8. A good stone should not be porous, rain water, enter the pores which is generally acidic, Chemical Composition of Stone Limestone and weak sandstone are relatively less durable than a good sandstone, granite or gneiss.

Marble, granite and sandstone are used for facing work of buildings. Limestone and sandstone are used for general building works. Fine-grained granite, marble, and soft sandstone are used for Carvings and ornamental works.

there are general qualities which are characteristic of all stone. Some common characteristics include appearance, weight, durability, strength, hardness, porosity, and resistance to fire and electricity.

The most common building stones are basalt, granite, sandstone, slate, laterite, marble, gneiss, limestone and quartzite.

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