Thread:SelenaZephyr/@comment-25555436-20141214161757/@comment-25555436-20141215011748

Kalin828 wrote: Its a form of stone, I believe. sorry for intruding >.< Don't worry.

According to the wikipedia, it's some kind of mineral. It's colors vary a bit, but it seems to be mainly grey. Fits the Color Naming rules then. I'll have it in mind.