Check it out at http://www.econsciousmarket.com/greenopia . I really like the gold jewelry they offer. You can find unique rings, earrings, bracelets, and necklaces. The prices are pretty standard for a custom made piece of jewelry. It is nice to know that not only are you getting something that is custom made, but also you are helping out, because a portion of the sales price goes to a charity of your choosing.
If you are not looking for a trendy/timeless piece of jewelry, you can find on this same site other unique items such as home decor, facial products, and even handbags.
Image courtesy of http://www.econsciousmarket.com/greenopia/women-s/jewelry/rings/octopus-ring.html.

This is such a great ring and would be perfect for summer! I love how many of their rings have a "sea" theme.
The picture below shows an octopus cuff, very vintage. If only it were a ring! Image courtesy of http://www.econsciousmarket.com/greenopia/alkemie-octopus-cuff.html.

Make sure to check out this website for some rare finds.