Chart of the day is...

...the long-term price of diamonds:

50 Years Historical diamond price trend chart
for average One Carat D Loupe Clean wholesale diamond prices

Evolution Graph from 1960 to 2010

Because I had the weirdest dream about this last night. Chart from this page

UPDATE: Via his twitter a/c, @randyduax points your humble scribe towards this diamond robbery story. Utterly fascinating, thanks RD.