Eutectic phase diagrams exhibit two distinct solid phases, each relating to a high concentration of one of the species involved. In contrast to this, some systems exhibit complete solid solution. The silver (Ag)-gold (Au) system, shown below, is one such example. Rather than there being a phase that consists of mostly silver and another distinct phase that consists primarily of gold, there is only one solid phase that can contain any amount of either silver or gold. This is why there are no solvous lines, like those you would find in a eutectic system. As in eutectic phase diagrams, this solid phase melts over a range of temperatures, not a single specific temperature like a pure compound. In the Ag-Au system, the difference between the solidous and liquidous lines is relatively small, but other solid solution systems can have a greater difference between these temperatures.