This is a very easy way of getting money and you don’t even have to move for the most part! The things that you will need is 43 magic for superheating items. you will need money and Nature and Fire runes (You can buy those if you don’t already have them). I have done this for a while and it has done wonders for me! You need to go to the grand exchange and buy any amount of combinations of ores that will make any type of bar that you desire. Low level bars are less likely to be sold at one time. I make mithril bars using 1 mithril ore and 4 coal. Mithril costs around 200 coins and 4 coal costs around 700 coins (around 175 for each). One nature rune will cost around 200 coins and 4 fire runes wil cost around 40 coins. You will spend about 1,100 coins for all the materials to make one mithril bar. A mithril bar will cost around 1,500 coins so you will make a 400 coin profit. Imagine that multiplied by 100, 500, or even 1,000! The more money you have, the more money you can make and then the more money you make, the more money you have to make even more money! Making 100 mithril bars will get you 40k! Making 1000 mithril bars will get you 200k! Go to the grand exchange and buy some runes, depending on the amount of bars of whatever you are going to make. Then put that in your bank, take out the runes and the amount of ores you need to make that bar. Smelt it, bank, smelt, bank. It is a very fast process and very easy to do but like all things in Runescape, it takes time. Happy Money-Making!
WARNING: PRICES OF THESE ITEM MIGHT HAVE CHANGED DRASTICALLY SO PROFIT MIGHT HAVE WENT DOWN ON THIS TECHNIQUE OR EVEN HAS CAME TO A POINT WHERE IT IS MONEY WASTING. MAKE SURE THIS STILL WORKS BEFORE YOU USE IT.