It isn't often that my RPG games and my 40k games overlap, but this is one of those times.
Pictured below is a Christmas tree ornament of an angel that has been repurposed onto a wooden base. The rocks are built up using crushed styrofoam. I painted the foam with acrylic and then spraypainted the whole thing. Finished up by drybrushing the statue with white and drybrushing the rocks in 3 colors.
I think it turned out fairly well.