An edge or angle where two surfaces meet; for example, moldings and raised edges.
A warping or curving of the wall cladding.
The ability of a rock mass to break along natural surfaces; a surface of natural parting.
There are two COF tests: Static and Dynamic. Most manufacturers will have a rating system that is based on or supported by the American Society for Testing & Materials (ASTM). Many times you can find these ratings on the tile sample or in the product catalog. One rating system measures Slip Resistance, which is measured by its Coefficient of Friction (COF). The higher the COF the more slip resistant the tile. This is important when selecting a floor tile for areas that get wet, such as your shower or bathroom floor. Other ratings listed by the manufacturer might include: scratch resistance, moisture absorption, chemical resistance and breaking strength.
A high-gloss finish attained by machine-grinding and buffing the stone.