No... it's deffinitely a gemstone. Buy that sucker, it's an amazing find.
Thought so. I did, along with a few other mineral training spears. Weird? Yup.
It might be an artifact stolen from an older fort, or picked up after said fort was abandoned.
Never had an artifact (

), first fort in this world.
Since you didn't mention which race, it was probably the Dwarven caravan, right? Dwarves have [GEM_PREF] in their raws. Sometimes the game doesn't check to see if an object SHOULD be made from a certain material... like when a human fort is made of Native Gold or Platinum. I think this is what happened here.
No, but this brings up something I was thinking about. It was the caravan from a modded race that I was playing at the time--
these guys, updated from 31.18. Another thing--back in .18, I got a clay training spear from them. Odd. Related?
Did you get it? It's a gemstone spear. Gotta be worth it. Maybe not for military purposes, but for sheer awesomeness.
Yup.
How much does it cost? That should help determine if its an artifact.
Not nearly enough to be an artifact.
It could be duplicate raws. Have you modified them in any way?
Yeah, but
A. I have been (too?) careful while modding.
B. Mineral spears are the oddest thing, and the only odd thing, to happen in my forts. Except for how little of a nuisance badgers tend to be.