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Will deconstructing a gold enchant give the gold trait item?
It is not 100%. Plus it took 8 gold items to upgrade it and at best you will get only 1.
For jewelry it is even worse. It takes 4 gold matts to upgrade jewelry, but takes refining 10 pieces to make one of those gold matts and deconing only returns one smaller piece or 1/40th of what is required.
Deconstructing glyphs does not on average give a good return. Chances of getting anything back are low, and you can probably assume most of those Kutas are gone. Technically it's not a 'trait' item.