No, sandstone is not an igneous rock. Sandstone is classified as a sedimentary rock, which means it is formed from the accumulation and compaction of mineral and organic particles over time.
Igneous rocks, on the other hand, are formed from the solidification of molten rock material, either magma beneath the Earth’s surface (intrusive igneous rocks) or lava that has erupted onto the surface (extrusive igneous rocks). Examples of igneous rocks include granite and basalt.
Sandstone is primarily composed of sand-sized particles, often derived from the erosion of pre-existing rocks, which get transported, deposited, and then lithified through processes such as cementation. This origin distinguishes it clearly from igneous rocks, emphasizing its sedimentary nature.