Ellipsoid 2
Here is the ellipsoid x^2/4 ^ y^2/6 +z^2/3=1, labeled with its equation. There is a second .stl file showing the surface without the equation.
This model was designed and printed by my WLU summer research student Emily Jaekle ('16). For more information see http://mathvis.academic.wlu.edu/2015/07/16/quadratic-surfaces-ellipsoid/.