Every element collector looks longingly at that row down near the bottom of the periodic table with the unpronounceable names. None of those slots are easy to fill and the "rare" in rare earths only raises the interest that much more. But as it turns out only a couple of those are actually truly rare. Europium and lutetium are the crown jewels in this neighborhood; Lu for rarity and Eu for its legendary difficulty in getting a tarnish-free specimen. Well, here's your chance at getting your hands on just such a beast. Check out that oxygen-starved glint. You know you want it. A happy 3g of unoxidized europium in argon, embedded in a 2x2 inch (50x50mm) block of crystal clear Lucite acrylic.  Lovingly embedded just for you in the USA.