% latex -interaction nonstopmode Stone.tex
\documentclass[pstricks]{standalone}
\usepackage{pst-marble}
\begin{document}
\begin{pspicture}(-6,-6)(6,6)
  \psMarble[
    background={
      [0.9 0.9 0.9]
    },
    colors={
      [70 139 67]
      [16 46 23]
      [227 223 171]
      [212 186 65]
    },
    viscosity=1000,
    oversample=1,
    actions={
      0 0 800 800 0 [colors 0 get colors 1 get colors 3 get colors 0 get colors 1 get] 225 30 uniform-drops
      0 0 800 800 0 colors 2 get 135 40 uniform-drops
    },
    spractions={
      0 0 1000 1000 0 colors 3 get 1000 1.6 uniform-spray
    }
  ](12,12)
\end{pspicture}
\end{document}
