The Gem Kingdoms

There are four kingdoms, the ruby kingdom, the emerald kingdom, the diamond kingdom and the obsidian kingdom. You are a part of the ruby kingdom and your goal is to get the energy stone from each. As you can guess the ruby has a ruby the emerald has an emerald and so forth. You can trade/barter, kill the kings, steal whatever you want just get the gems. The ruby kingdom is known for it large armies. The emerald kingdom is known for great beasts. The diamond kingdom is known fore high security and its databases/tech like lasers and smart doors. The obsidian kingdom is known for its advanced weapons. Also the obsidian kingdom is very well hidden and not even the greatest puzzle masters can solve it. Good luck!