Hi MM,
This is how I would go about recreating that ring:
1. Start with a ring blank (or cast your own) with a flat top.
2. Use a two part epoxy clay on top.
3. Press the turquoise chips into the clay.
To get the gold look to the clay, I would either use a gold epoxy clay, or you could Envirotex jewelry clay and dust it with a gold Pearl Ex powder. (Both of those products we sell on our website.)
Good luck!