Golem picks up Crystal Focus?

[Achievement:BugFound]

Not sure if this is a bug or not. My golem picked up a "multi-hued crystal", and after having it drop it, I picked it up myself to find it was the Crystal Focus.

EDIT: I guess my question is: why did the golem pick up the object in the first place?!

[Radon26]

artifacts have different names, when they are not identified.

was the text gray before? because that means unidentified.
and your character auto identifies on pickup

[XLambda]

The unidentified item names are a remnant of ToME's item ID system. Item ID is no longer a part of the game, but the system still exists - artifacts come unidentified but you start the game with an item that auto-identifies them when you pick them up. Of course, your golem doesn't have that item, and that causes the behavior you observed.

Back in the betas you actually had to use the orb of scrying to identify artefacts. Oh, the old days...