The sapphire ring is made by using a gold bar on a furnace while having a sapphire and a ring mould in your inventory. It requires a Crafting level of 20 and provides 40 experience when made. Making this item will result in a profit of 354 coins.
Grum's Gold Exchange in Port Sarim used to buy at better price than High Alchemy, depending on his current stock. If he has no sapphire rings for sale, he buys the first for high alchemy.
The sapphire ring can be imbued for the price of 74,600 Mobilising Armies points, turning it into a sapphire ring (i) by giving it to an officer in order to be enchanted.
Sapphire rings are commonly obtained from bird's nests.