Hi Jess,
I would start by taking new pictures. The colors are not that well, use -
http://www.picmonkey.com/ - it's not that difficult. Bright up the colors, give them a fresh new look.
Work on your titles - your key word has the be in the first 3 words.
* Denim and Dark Blue Geometric Tapestry Envelope Necklace
* Geometric necklace, grey blue necklace, pendant necklace
Make longer TAGS - use the all 20 lettres
* Girl > inexpensive girl gift
* Women > women necklace
* Necklace > pendant necklace
* Unique > unique jewelry
* Blue > blue grey necklace
* Geometric > abstract geometric
* ....
Who is it for - leave it open. Also a girl or friend or grandmother can wear it. You make your group of potentiel buyers smaller.
Good luck