How to Identify Metamorphic Rocks and Not Mistake them for Igneous Rock | Foliation and Crystals

0:00 Metamorphic rocks and how they differ from igneous rocks 0:32 Marble and its crystals 0:57 Slate and its foliation, 1:45 Schist with foliation and crystals 2:33 Gneiss, the strongest metamorphic rock.
The stages of metamorphism can be seen in the transformation of relatively weak shale (sedimentary rock) to slightly improved version called Slate (metamorphic rock), then with higher pressures and temperatures, this rock will turn into Schist, and with even higher pressures and temperatures it will become very strong gneiss.
More explanation on the origin of metamorphic rocks can be found here • Metamorphic Rock Origi...

[@hichemjason]

I want to know the type please

[@hichemjason]

I have one

[@jneal4154]

So much for teaching people how to not confuse metamorphic rocks for igneous rocks.
"Metamorphic rocks are usually foliated" doesn't really help very much. 🤷‍♂️