I recently came upon a 14 karat gold mechanical pencil and thought I'd share it with you. It's the first time I see anything like this but have since found a few similar pencils for sale on ebay. Some info refers to this as a pendant. Cool, eh?
Here's a closed up view.
Now tugged open a bit.
And here fully extended.
The tip twists to extend and retract the 2mm graphite.
Fully twisted out reveals an inner collet for mounting the graphite.