Making Tiaras

The best location for this long but worthy method is the Al Kharid Mine, and then Lumbridge.

This method consists of first mining silver(40 mining xp), then going to Lumbridge and Smithing the silver ore into silver bars(13 Smithing xp), AND then crafting it into tiaras(52.5 Crafting xp). If you have a whole inventory( 28 spaces) full of silver bars, and you are about to craft all that into tiaras, you will get around 1,400 xp.

Bsically, you need to go to the AL Kharid mine just north of it. You have to pass the duel arena. There, mine silver. There are 5 silver ore rocks. While you are waiting for the ores to re-appear, just mine coal or iron, or even mine and collect gold ores. They gives more smithing experience than silver ores. Once you have an inventory full of silver and/or gold ores, home teleport to Lumbridge. There is a smithy with both a furnace and anvils in one place. It is also the only smithy that has both a furnace and anvils in one place for F2P players, excluding Daeminheim. Going back to the original topic, convert all of your ores into bars using the furnace. Then click the furnace again and a sign will pop up labeled Crafting on top. If it is for gold casting, chose to craft an amulet or whatever gives the most crafting experience. Then, after you are done with gold, click the furnace again. The label of the tab is going to be labeled Crafting again. Choose to craft tiaras. That's all there is to this good, ole', trusted method.