The Finder Compass gives a little more ability to your standard compass. It adds extra needles to help you find strongholds, diamonds, mob spawners or any other ores. There are 3 modes to set the compass: Adventuring, Shiny Stones, and Working Man’s Mineables; each able to find different things.
You can change the settings whenever you want by clicking anywhere with the compass. Adventuring mode will help find strongholds and emeralds; Shiny stones mode will find diamonds and redstone; and the working man’s mineables will find things like iron, coal, and gold. Then whenever you’re near the items in question just take a look at your compass and it will start to point where you need to go. The compass will color code the needles to which item they’re pointing to to make it easier to decipher what you’re looking for.
It’s incredibly useful to cut down on the amount of time it takes finding useful things like iron, coal and especially diamonds. Now you won’t need to specifically vein a mine looking for those precious resources.