The file 'Emerald Gemstone 3D Printer Model' is (stl) file type, size is 3.7KB.
This thing has moved to Youmagine https://www.youmagine.com/users/jensa so I don't also get sued by Stratasys...
My daughter wanted an emerald as my son got a 3D printed Diamond, so I made her this Emerald using Rhino.
