Yeah, they stated and some point that they weren't going to make them saleable again. We can't even vendor them for a few coppers.. we have to destroy the garbage manually.
Interesting spin -- These are also crafting resources, as I found some stashed in our harvest depot. There isn't any reference to crafting in the items description. They were listed as level 100 crafting resources.
There are some in the book "Clan Bloody Tooth Spirit Stones", which you buy from Scribbleclaw in Obulus Frontier.