What pipes are they?

[john smith]

Want to replace my old sink with a vanity.
Can someone tell me what type of pipes the photo in the below links are and can I use compression fittings or solder?

01 hosted at ImgBB

Image 01 hosted in ImgBB

ibb.co

02 hosted at ImgBB

Image 02 hosted in ImgBB

ibb.co

 

[ShaunCorbs]

Soldered fittings with copper pipe

You can use either I would suggest some type of isolating valves

 

[john smith]

Soldered fittings with copper pipe

You can use either I would suggest some type of isolating valves

Thanks for taking the time to reply.
I see the elbow is copper as I scratched it and the color is as I expected but the pipe it's self is silver and when scratched stays silver. Could the pipe be made from something different?
Neither is magnetic, so I also thought they were both copper but the color made me think twice.