This is why I decided to make a guide on how to make one, hopefuly it will help some of you.
First of all, you need 70 crafting to make an Amulet of power.
To make an Amulet of power, you will need the following items; Uncut diamond, Chisel, Gold bar, Amulet mould, Ball of wool, 10 Earth runes, 1 Cosmic rune.
-Use the Uncut diamond with the chisel and cut it into a Diamond.
-Go to Mining teleport ( You can access Mining teleport with the Skilling teleport ) and mine a Gold ore.
-Go to Smithing teleport ( You can access Smithing teleport with the skilling teleport ) and use the gold ore on the furnace.
-Use the Gold bar on the furnace and make a Diamond amulet. Make sure to make the diamond amulet and not the Gold amulet.
-Now use the Ball of wool on your Diamond amulet to string it.
-Use lvl-4 enchant on your Diamond amulet to turn it into an Amulet of power.
I Hope this guide on how to make an Amulet of power helped you!