1.1mm diamond brillant cut problem

 From:  Samuel Zeller
Hey everyone,

I got this model of a diamond in parasolid, someone converted it for me in .iges and I opened it up in MoI (see attachments)
Someone working in the industry told me that the cut was not quite right, as you see there's ultra-small surfaces that generate extra-useless polygons when exporting in C4D. It's already at 400 tris per diamond which is freaky and oh-so-wrong (got 3800+ of them in C4D even with instances my memory when rendering goes up to 11gb on 24gb). Maybe someone here as the same cut with a proper mesh to share ? I don't have any jewelry software to generate a clean brillant cut :( Would be great if someone could provide me a .3dm one !