Slate is a fine-grained homogeneous sedimentary rock composed of clay or
volcanic ash which has been metamorphosed in layers. Slate can be made into
roofing shingles because it has two lines of breakability: cleavage and grain.
This makes it possible to split slate into thin sheets
Bozeman Marble & Granite offers one of the
largest collections of natural stone slabs in Montana. We have several
different types of stone available and in stock.