The emerald ring is made by using a gold bar on a furnace whilst having an emerald in the inventory. It requires a Crafting level of 27 and gives 55 experience when made. Making this item will result in a profit of 182 coins.
The emerald ring can be imbued for the price of 89,600 Mobilising Armies points, turning it into a emerald ring (i) by giving it to an officer in order to be enchanted.