Go through this guide, and you will learn the method to get the Silver and Golden treasure in Roblox Noob Army Tycoon.
They are both different from the other treasure, and they replace the normal treasure. 
They do not have their location but can replace any normal treasure’s location. If you don’t see them for a while, go to a VIP server or collect the normal treasure. The silver chest replaces the normal treasure but has a higher chance of spawning than the golden treasure. The golden chest also replaces the normal treasure but has a very low chance of spawning.
They can spawn anywhere a normal treasure chest can spawn!
In the broken wooden house right next to it, the cave! 