Rock Quiz

I am a rock that is formed by the cooling and Hardening of magma and lava. I am a rock with very large crystals I am coloured black and white who am I?

I am a rock formed when plants and dead animals get glued together I am brown and I have no crystals who am I?

I am a grey rock that is formed by cooling a hardening of lava I could have small crystals but I cool to fast so I don’t have any .Who am I?

I am a yellowish coloured rock I am formed when small pieces of rock are stuck together. I have no crystals but sometimes I can hold a fossils. Who am I?

I am a different rock because I am made from a rock that has already been formed that then gets put with heat and pressure I am made from mud stone and slate my colours are dark grey. Who am I?

I was once limestone but with the help of heat and pressure I became a well-known rock I can be white or white with black streaks. Who am I?