I am a custom gem cutter on the side (I do software for the day job) and thought someone might want a real commodity for Bitcoins and i get some to work with. Up for sale is a custom cut 1.2 carat montana sapphire in an Asscher cut (max sparkle!) . Rather than those dark black excuses Macys sells, you get something of real tangible value.
You can see the stone and my other work here: http://s562.photobucket.com/albums/ss69/johnleb/
Here's a picture of what you get for 30 bitcoins (sorry about the dust and gnarly tweezers, the finish is perfect)