The Bureau of Mines has produced spatial graphs of phase and group velocities for single crystals of anisotropic materials using a numerical procedure and a computer. Values of particular properties throughout space were computed and plotted. Results are presented in the form of contours on equal-area projections for 16 common rock- formng minerals. The materials studied were magnetite, ice, muscovite, biotite, quartz, calcite, hemotite, olivine, orthoclase, augite, microcline-perthite, Albite No. 9, Obligioclase No. 24, Oligioclase No. 29, Hornblende, and Laboradorite No. 56. The included curves will be useful in interpreting results from tests of actual rock samples in an ultrasonic bench. The data also show the theoretical variations in velocity and the energy distribution rate as waves propagate from a point source within the given materials.