What is the difference of the three rock types besides the way they are formed?

Answer 1

From a purely textural point of view they are as follows:

Sedimentary: grains of similar or differing sizes showing variable sphericity and roundness either grain or matrix supported.

Igneous: crystalline grains interlocking but not showing any preferred orientation.

Metamorphic: crystalline grains (for the most part except low grade metamorphic rocks) interlocking, most often showing preferred orientation (alignment) and which may contain associated metamorphic minerals such as garnet, kyanite and sillimanite for example.

Answer 2

Igneous - made when magma, a hot liquid made of melted minerals cools.

Sedimentary - formed when sediments, pieces of rocks broken off by weathering and erosion, are compacted together.

Metamorphic - formed when rock is transformed by heat and pressure

Answer 3

The three main rock types are igneous, sedimentary, and metamorphic. Igneous rocks are formed from the solidification of molten material, sedimentary rocks are formed from the accumulation and lithification of sediments, and metamorphic rocks are formed when existing rocks are subjected to high heat and pressure, causing them to recrystallize. Each type has unique characteristics such as texture, mineral composition, and origin that differentiate them from one another.