Knowledge (geography), or Craft (gemcutting) or (jewelrymaking) DC30:
The Longinus state of Eldoria is famed for its rich gem veins and jewelery. Many villages are built around a mine or two, while many others pass down trade secret gemcutting techniques. One secret artisanal technique local to the town of Briaringen is the art of making 'holographic' rings that seem to display a 3-dimensional illusory image within set stone. This is done by carefully carving a shallow relief into the back of a translucent gemstone, then setting it into a ring in a certain way. The light refracting and reflecting in and back out when the ring is worn will make the relief appear as a floating shape within the stone. This is used most often with faces to create 3d cameos, but also the symbols of various deities, animals, or other simple designs. It works best on rings, but masters can also do it with pendants, earrings, or clasps.










