About item appeareance

If an player use any appeareance stone on an armor or weapon and he enchant/put any element/augment it the appeareance disappears. I want to keep the appeareance in this cases. Where can I change it on source?

The the appeareance disappears because when the item is enchanted
a new item takes its place (and in this case there is no check for appeareance).

Search/Check on scripts that involve item enchanting etc.