The contemporary answer to the mizpah, and much better than hanging an execution device around your neck.
Celebrate a friendship with someone with whom you pair well by giving your friend one side of the pair and keeping the other.
Genes are written in DNA and RNA molecules using a code of chemical units called bases. These bases form pairs, which is critical to their function. In DNA, A (adenine) pairs with T (thymine) and G (guanine) pairs with C (cytosine). In RNA, G pairs with C and A pairs with U (uracil).
The charms are based on shapes of the base molecules. They are strung onto a chain at the place where they would normally connect to the sugar-phosphate backbone.
This set of two necklaces comes with your choice of A-T, A-U, or G-C. The charms are about 3/4 inches long, are made with high-quality reclaimed/recycled sterling silver, and strung on a 16 in sterling silver snake chain.
These come in a pretty, recycled gift box and include an informational card about the molecules.
Le Café Wittypoots 
The science geek is just gonna throw this out there. If anyone is planning on getting one of these, go for the G≡C pair. Guanine and cytosine share three pairs of hydrogen bonds making GC the strongest bonded of all nucleic acid pairs. Which incidentally makes it a b*tch to work with high GC content sequences when you’re doing nucleic acid amplification, but I digress. Just saying that if you wanna express how strong you feel about someone you might wanna pick that one.
This is awesome advice, NP! Thanks!