To access the Jewelcrafting station, head toward the Crafting Teleport in the main city temple, as shown in the image. After entering the teleport, simply go to the left, and you will be at the Jewelcrafting station.
Interacting with the Jewelcrafting station will open a window that contains all the possible recipes available to craft, along with the required materials for each recipe. Each recipe requires a certain amount of BlackTalon Coins, the main currency of the server, as well as Gold.
In addition to material costs, the recipes will also require a certain crafting skill level to complete. This means that as you craft anything within Jewelcrafting, you will gain experience for the Jewelcrafting skill. You can see your current crafting skill progress on the character information panel, as shown in the image.