Specific gravity(G)is a property of the mineral or [not to 500 or 1000 ml rock material forming soil grains same scale] density jar Pycnometer) It is defined as coarse solIs mass of a soil grain 50 ml sG Bottle for fine soils mass of an equal volume of water Method of measurement For fine soils a 50 ml density bottle may be used for coarse soils a 500 ml or 1000 ml jar. The jar is weighed empty(Mi). a quantity of dry soil is placed in the jar and the jar weighed(m2). The jar is filled with water, air removed by stirring, and weighed again(M3 ) The jar is emptied, cleaned and refilled with water-and weighed again(M4) Mass of so il Mass of water displaced by soil M1)-(M3-M TThe range ofGs for common soils is 2. 64 to 2.721Specific gravity (Gs ) is a property of the mineral or rock material forming soil grains. It is defined as Method of measurement For fine soils a 50 ml density bottle may be used; for coarse soils a 500 ml or 1000 ml jar. The jar is weighed empty (M1 ). A quantity of dry soil is placed in the jar and the jar weighed (M2 ). The jar is filled with water, air removed by stirring, and weighed again (M3 ). The jar is emptied, cleaned and refilled with water - and weighed again (M4 ). [The range of Gs for common soils is 2.64 to 2.72]