Photos

The microphotgraph you are viewing is that of a sample of a sandstone rock (from Gogai/Ahmadoon region) and those three grains with clear-cut and geometric faces are the grains of the mineral 'QUARTZ' which with our eyes we can not see when we hold a sandstone rock or a handful of sands from a beach. In the case of the above picture the 'quartz' grains were formed as a result of a process called 2ndary mineralization whereby SiO2 rich solutions/fluids in a rock (sandstone in this case)help facilitate the growth of new quartz crystals. The largest grain/crystal in the picture is around 50 um (micrometer)= 1 mu being one millionth of a meter or 1 thousandth of a millimeter (mm). Please see the scale bar on top of the picture is equal to 50 um (micromter).

Khadim Durrani