I cannot find a list of standard plot markers (square, trinagle, dot, circle, disk, cross, plus, ...) and how to use them.

Fore example I can access a self made cross, by:

cross = Graphics[{Blue, Line[{{{-1, -1}, {1, 1}}, {{-1, 1}, {1, -1}}}]}];
ListPlot[{{1, 1}, {2, 2}}, PlotMarkers -> {cross, 0.1}, PlotRange -> {{0, 3}, {0, 3}}]

Is this symbol and the others in the list predefined, and how can I use them in a plot?