GeekArmory.com Geek Girl Jewelry http://geekarmory.com/category/geek-wear/geeky-jewelry/
iNecklace from Think Geek -- Perfect for the ladies!
That's a necklace I'd wear all the time!
How to win at Valentine's Day. I'm in love with all of these (especially the serotonin necklace)
Made With Molecules: Chemical Jewelry - for my geek side
Do you have to wear two necklaces if you consider yourself a geek and a nerd?
Planet Saturn Necklace stainless steel chain geek by Szeya, $12.00
Geek is the New Cool- laser cut geek necklace in black FREE SHIPPING WORLDWIDE
Etsy necklace for all the girl gamers. Now that's geek chic!
Just Chemistry Science Geek Test Tube Rack Necklace