It’s the symbol used in chemistry for the molecule dopamine...
http://store.madewithmolecules.com/product/dopamine-necklace
Now I wish I had asked you what the symbol was...another thing I’ve learned today. People here just simply amaze me.
Hmmm....I wonder if she’s a chemist :-)
Thanks deks, interesting.
When I saw it on her it looked like a Q and we are o into Q that I am pulling my hair out.