Holding the tokens does not mean that you have specific emeralds sitting somewhere for you. You use the tokens you have to redeem emeralds from the Marketplace. The emeralds are priced in tokens. You can check out the Marketplace here: https://market.gemera.io/
The project has established an alliance with major Colombian emerald producers who provided emeralds that are already certified and stored in Malca-Amit facilities in Hong Kong.
For more information you can read see the whitepaper here: https://src.gemera.io/src/GemeraWhitePaper.pdf
Check out the video here: https://youtu.be/g3evxT0NHdQ
For frequently asked questions you can look over the FAQ here: https://www.gemera.io/faq.html
You can ask more technical questions here: [email protected]