\documentclass[pstricks]{standalone}
\usepackage{pst-marble}
\begin{document}
\begin{pspicture}(-6,-6)(6,6)
  \psMarble[
    background={
      [64 64 64]
    },
    colors={
      [0.275 0.569 0.796]
      [0.965 0.882 0.302]
      [0.176 0.353 0.129]
      [0.635 0.008 0.094]
      [0.078 0.165 0.518]
      [0.824 0.592 0.031]
      [0.059 0.522 0.392]
      [0.816 0.333 0.475]
      [0.365 0.153 0.435]
      [0.624 0.588 0.439]
    },
    viscosity=1000,
    oversample=1.5,
    actions={
      0 0 48 colors 25 concentric-rings
      90  [-150 450] 100 750 31 rake
      -90 [-150 450] 100 750 31 rake
      180 [ 25 50 0 tines ] 30 200 31 rake
      0 230 shift
      -40 400 0 90 90 jiggle
    },
    shadings={
      -40 400 0 90 jiggle-shade
    }
  ](-6,-6)(6,6)
\end{pspicture}
\end{document}