What Is This?

What's this here? A leaked prop from Tron: Legacy? A high-tech bug zapper? It's something much more basic than those, but still fit for a king.

What you're looking at is a high resolution photograph of the noble gas Argon, taken by Wikipedia user alchemist-hp. It's one in a series of 36 pictures taken so far, with the ultimate goal being to capture all 94 naturally occurring elements to fill in his clickable periodic table. Here are some others; try guessing what they are before looking at the label:

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It's obviously evocative of the Elements app, although with the added benefit of being totally free. [Wikipedia via Make]