Have you used wulffman software for wulff construction.
I have used online nanoHub (https://nanohub.org/) wulffman software for wulff construction. I am able to draw my structure according to surface energy but I am not able to save generated image in a JPEG or any format so that I can open in other software. I am getting same image as in wulffman code paper contain.
If you are lucky, you may find the surface energy already reported by someone else, otherwise you have to calculate yourself the surface energy for almost all the crystalline surfaces, or at least for those with low indices. You can select the most important faces based on a low accuracy energy calculation method (empirical force fields, semiempirical methods or low quality ab-initio methods). MedeA permit you the enumeration of the most important crystalline faces of a given crystal.
See the MedeA computational environment of Materials Design (www.materialsdesign.com). It has the Wulff construction included and it allows to calculate the surface energies using a very convenient setup of surfaces.