In ESO, you can disenchant traits on armor and weapons for creating that same trait on new armor and weapons.
Is there a way to know if I've already disenchanted the trait on an item? I'd like to know if I can go ahead and sell the item or hang on to it to disenchant it later.
Best Answer
If you go into the researching tab (the last tab when in a crafting station) you will see the traits and their associated gems. Ones that are blacked-out/grey are traits you do not yet have researched. If you have a trait researched you will clearly see the color and if you try to research a trait you have it won't let you anyway.
There is no way when with a merchant to check before selling the item, you'll have to individually check enchanted weapons/armor at their crafting station beforehand.
The trait wiki shows all about the traits and getting them.