The physical property that are being tested, when you break quartz to learn if it splits smoothly in a certain direction is called conchoidal fracture. I hope this is the answer you were looking for. This kind of fracture is actually a curved breakage that resembles the concentric ripples that can be seen in muscle cells.
it forms a major river system in Western Asia. Originating in the Armenian Highlands of eastern Turkey they flow through Syria and Iraq into the Persian Gulf.