Marble block
Marble with lapis lazuli
Marble brick block
Marble (the metamorphic equivalent of limestone) is found adjacent to banded iron formations (BIFs), other metamorphic rocks (e.g. schist), or by itself in big masses underground. It can also be found in the contact zones where skarn is present. You will be able to extract zinc from marble since it contains sphalerite (a zinc-bearing mineral). You will also find the blue rock type lapius lazuli in some marble blocks.
Marble can be turned into bricks with sandpaper.