The dwarven king will give you some information on the breastplate after you do a quest there (main plot) and will provide you with the helm after you get the breastplate forged with the gem. The dragon gloves are <span class='standouttext'>Spoiler : </span><span class='spoiler'>in the elven burial grounds, south of the elven village.</span> (highlight the text to read)
You can only get outside the house of madness by cheating. The gems were placed around there just to frustrate people.
Teleporting Anywhere, via hex editor 
