\begin{pspicture}(-4,-5)(4,5)
\psframe*[linecolor=gray!40](-4.1,-5.1)(4.1,5.1)
\psframe*[linecolor=yellow!40](-4,-5)(4,5)
\psset{SphericalCoor,viewpoint=100 35 10,Decran=150}%,action=draw,num=all,show=all}
\psset{lightsrc=100 35 cos mul 10 cos mul 100 35 sin mul 10 cos mul 100 10 sin mul}
\psSolid[object=calcite,r=2,h=6,fillcolor=yellow!50,opacity=0.7,action=draw**,hollow,
         trunc=6 7 8 16 17 18,trunccoeff=0.25,
         fcol=12 (orange) 14 (orange) 15 (orange) 13 (orange) 17 (orange) 18 (orange)]
\end{pspicture}