First cam diamonds from peanut butter, in Scotland, in 2007. Then came diamonds from tequila, in Mexico, in 2008. Now, in 2014, come diamonds from peanut butter, in Germany.
(Thanks to Roger Highfield for alerting us to the German peanut butter.)
BONUS (not necessarily related): The effect of peanut butter on the rotation of the earth
UPDATE (possibly unrelated, and involving a small-sample, perhaps unreliable test): “‘Peanut Butter Test’ Is A Quick And Easy Screen For Alzheimer’s“