They are the Travesty Remains I was talking about. You can find them on vendors... you only get them from 1 monster, in 1 dungeon, by group hunting the Travesty Boss. They come in a few different shapes and normaly are blue. You use a statue dye tub to change their color or remove it. You can also use the new dyes from plants and the toxins to remove the color.
Any item, at least the question to where they come from, is easy. Ant Lions, in the Ant Dungeons, give the "Unknown Mage" and the like bone containers. Body parts... shipwrecks. Really nice bones come from shadow wisps... the harmless ones.
I'm not going to show that whole level of that house... but its like 30 million worth of rares and days of collecting junk.