Element rings from INN:itsnoname. Available in three metals, each matching the chemical symbol; silver, gold and platinum. Prices match the type of metal; silver is $255.oo, platinum is $6,6oo.oo.
The just-as-much-fun but much more reasonable priced selection from nicholas and felice on Etsy.
"Geek Magnets" from Anandi on Etsy. She does the "bling" collection shown below, and her dark side comes out in the toxic lead/mercury set.
And the coolest wine label out there right now? Goes to Wines of Substance; a new Washington label being produced by some guys getting some very big recognition. Their website has a fun interactive "Periodic Table of Washington Wines".