I have repeatedly seen that a geologist's terminology regarding the formation of an igneous rock is "crystallization" ; the lava 'crystallizes' & an igneous rock is born... is this terminology correct??? Shouldn't it be ; the lava ' solidifies ' & an igneous rock is born. ??? I have seen quite a lot of people using the first sentence which made me think I might have misunderstood the process of rock formation,or is it just a mass psychology? If the rocks are crystallized, what makes them different from Minerals... Previously I used to think that the main difference is that the rocks are solidified lava in a random way, & minerals are highly ordered crystallized crystals. Thanks in advance.