I found a wonderful resource guide to metalsmiths on Etsy. So the next time you are desperately seeking adornments based on cellular structures or internal organs, you need look no further. This is Nanopod's Heart necklace.
She also makes
If you're in the mood for something slightly more dangerous looking and you have a few grand burning a hole in your pocket, I suggest you take a look at DiscoMedusa.
If $2500 is not quite in your budget this week, she also has dozens of affordable baubles, like this cell necklace:
I love the different layers in this necklace. The lacey center is a bit of a theme in this shop.
For the unrepentant (but stylish) nerd in your life, Beaujangles has these cufflinks:
Space Invaders! Man, you just can't get away from the inevitable retro-dork reference, can you? No, I didn't think so.
Oh, and just in case you are wondering feverishly what on earth to do for Halloween, you can always go as an Amazonian warrior princess:
You can thank me later. With pictures.