black granite counter top- is the black colour natural ?

[applebanana 0]

hi folks, anyone knows? when I look at the cut outs, the black colour is only on the surface. the granite itself is grey. when I checked with the supplier lian hin, they claimed that the black is natural. 

[nerrad 7]

yes.... because only the surface is polished, and only the polished part will be truly black. the unpolished part, which is the body of the granite beneath the granite top, will be gray...

 

this is normal. 

[Jason Day 1]

it is normal. dont worry.

[ventot 1]

yep, very normal!

[applebanana 0]

thanks all for the reply.  so the black is not natural? how about other colour granite? also only top Colour? 

one more question. I got glass backsplash installed after the granite was installed. after the backsplash installation, marks were left on the granite top which can't be removed. any idea what this is?