Here in mining simulator you are mining inside a cave you are most likely to gain iron from the caves you could get gold or even gems! You need to fill your pan up and then pour some water in before scrubbing it you only get 1-5 gems/ores every scrub Iron is most likely to be worth 5 coins depending on how large it is gold is also worth 5 coins depending on how large it is and gems are usually worth 6 coins depending on how big it is