Trophies: Chattering Skull

[Proxy]

So what is the deal with trophies...most of which I have obtained are from quests and add some strange effect or something when used.

I just found a rare chattering skull. Used it and it disappeared from inventory and did nothing. What happened to it? What is the purpose of it?

[Natjur]

There are two types
(1) From dungeon quests and they do something random and silly
(2) From random npc and they are for a collection achievement. Click on them once and they disappear and get added to the collection, look under achievements to see the full list.
If you get the same one a second time, either give it to an alt to use or sell it for a few gold

The Chattering Skull is for "The Living Dead" collection achievement
http://elderscrolls.wikia.com/wiki/The_Living_Dead

[Proxy]

Awesome, thanks.

[Sooriski]

I am a beginner to this. I soon had a chattering skull. I doesnt chatter but I kept it anyway. Today I clicked on it (as I had read today on the forum that it is a trophy and that I should click on it to add to my collections). So I did. Now it has completely disapeared. I had previously found that I had a red Silk Map. I could find no reference to this anywhere at all. Neither in help, on the forums or out on the internet. Therefore as it appeared to be totally useless I sold it to make space. Now I believe that it may have been a very rare item. There is no guidance on what to do in these situations! There should be a pop-up when you first find these things saying that this item is a rarity and should be stored, and indeed where and how how to store it. (Not flaming anyone here - just trying to be helpful) :)