Will! Bring home some Popov!

adiamondisforever.com:

"Vodka on the Rocks
No one is sure how it was actually discovered, but it is safe to say that at some point someone took the idea of a 'vodka on the rocks' literally and discovered an imaginative way to clean their precious diamonds. Simply let the diamond soak in a glass of vodka. Preferably one you do not intend to imbibe."