To make those earing i used bitumen to attach earing stud to the part. I got this from a friend ( http://www.sashe.sk/bosbubalus ) who makes jewels ( http://www.fler.cz/zbozi?uid=60649 ).
And because we are talking about jewelry, the jewelry has to have a nice box. Of course geeky one :) I got a box from a shop selling jewelry. The lady behind the desk was so kind that she gave me one for free. I used some more smd parts to decorate earings box. I superglued smd ICs on the box from all sides. Integrated circuits are also called bugs so you can imagine it as a creepy earing box with bufs crawling all over it :)