1. A method to display the scintillation of a gemstone, the method comprising: acquiring the angular spectrum of an oriented gemstone relative a point of observation by: tracing a ray to said gemstone from said point of observation to a point of intersection of said gemstone; propagating said ray in said gemstone until it exits said gemstone; determining a region of a hemisphere arranged about said gemstone that said ray intersects; coding said point of intersection with a value according to said region that said ray intersects; repeating said steps of tracing, propagating, determining and coding for a plurality of points of intersection of said gemstone; tilting said gemstone to a new orientation relative to said point of observation and repeating said acquiring for said gemstone in said new orientation relative to said point of observation; repeating said tilting a pre-determined number of times; averaging said values for each point of intersection from all said acquiring; mapping said average value of an associated point of intersection to said associated point of intersection on an image of said gemstone.