We were just turned onto LA based jewellery designer London Manori. In fact, we liked the leaves so much we bought the very one pictured above. That piece of jewellery is in fact an actual ginko leaf, it just happens to have been dipped in a precious metal. It's some kind of science nerd thing where the leaf is coated, and then plated using some process blah, blah, blah. Suffice to say it is cool, and we like it. Best part, this stuff is very reasonably priced. Have a look at the website and peruse the gazillion designs available. If you like anything, we've been granted permission by the local London Manori rep to give out her contact email. Feel free to contact her for local purchase information.
Email contact: firstname.lastname@example.org