Gem rocks

Gem rocks can be found on Neitiznot Island. In order to reach them, you will have to cross 2 bridges which both require 65 agility. You can mine them for Gems ranging from Sapphire up to Dragonstone. They are a good place to train Crafting, because when you bring a Chisel with you, you are able to stay there as long as you wish. You get the most advantage of this when you achieved 99 Mining and if you are using a Dragon pickaxe because of the special attack.