yea it's nothing without a description.
Incidentally, why does every dwarf artifact have to menace with spikes? I don't think I've had one that doesn't have them.
It's a cultural thing, our puny human minds just don't get it.
Seriously, it's coded into the entity:
entity_default.txt, civ "Mountain" (i.e. dwarven)
[ART_IMAGE_ELEMENT_MODIFIER:PLANT:64]
[ART_IMAGE_ELEMENT_MODIFIER:TREE:64]
[ITEM_IMPROVEMENT_MODIFIER:RINGS_HANGING:64]
[ITEM_IMPROVEMENT_MODIFIER:BANDS:384]
[ITEM_IMPROVEMENT_MODIFIER:SPIKES:384]
Influences prices dwarven merchants offer for decorations of the given types resp. images of the given subjects and also influences frequencies with which crafters will pick that type of decoration when decorating things. Point in case - my super-encrusted gem baubles (>150 decorations each) have 10 and 9 "hanging rings" decorations vs. 44 and 37 "menacing spikes".
For those civ-specific value adjustments, decoration value is modified by the given values against the default of iirc 256, so a menacing spikes _decoration_ (not the item that's decorated with them, just the individual decoration) sells for 50% more to the dwarven civ (but gets zero value from elven traders; elves dislike spikes but value trees as image subject very highly).
In short: dwarfs just really like spikes. They also like "bands" as decoration, but those can't be made from all materials, while everything can be fashioned into spikes:
it menaces with spikes of wool. (Random search image)