1 Paint-there are dozens of quality brands available, and for a room in the size described it will require two full gallons to cover the walls. 2  The better paints will cost between $30 and $50 per gallon, and will come as flat, semi-gloss, or glossy finish.
Foliation is the result of the parallel arrangement of (micas, etc.) in a plane perpendicular to the maximum principal applied stress. A lineation is caused by a similar growth of elongate minerals (eg. hornblende) in this plane. Slate, schist, and gneiss are three common foliated metamorphic rocks.
Kinds of Metamorphic Rocks. 1  Slate - low grade metamorphosed shale; very fine grained; slaty cleavage should not be confused with bedding planes. 2  Phyllite - next step up from slate, larger mica grains give the rock a luster.  Schist - a strongly foliated rock with large grains of platy minerals.