  We demonstrate the generation of coherent Stokes pulses with randomized
linear-polarization in diamond, when the pump wave-vector and linear
polarization were oriented along the $[110]$ and $[1\bar{1}0]$ axes
respectively. In this configuration the excitation of multiple Raman modes
produces isotropic gain, preventing the Stokes pulse from acquiring a
deterministic orientation and is instead randomized by the zero-point motion of
the crystal. Experimental polarization measurements were consistent with an
independent, identical distribution with an estimated entropy rate of 6.67 bits
per pulse.
