ID's change from item to item, TYPE's are what I believe you are looking for.
Artifact TYPE's are usually the same as their non-artifact counterparts. So Ornament of the Magician is a Bracelet, etc...
The way to find out if they are an artifact would be to use event property and look for clues, like the word "artifact" or even 255 for durability.
There are arty insurers over at EUO, have a look.