Igneous rocks are formed in the magma chamber
There are always crystals* in these rocks
There are no fossils
There are Grains in these rocks
There is no sign of stratification in these rocks
Igneous rocks does not react with acids.
*The size of the crystals depend on the speed of crystalization
Slow crystalization would result in large crystals and vice versa for slow crystalization.
Hope it helps :D
