How about adding some very rare objects that you can stumble upon while mining.
- Maybe 9 different "hard-to-get" pieces of dinosaur remains. This would give that rare chance of a huge find when mining!
- When you have all 9 pieces you can combine them and get a very special decorative dinosaur block (statue)
- Maybe 9 different "hard-to-get" pieces of dinosaur remains. This would give that rare chance of a huge find when mining!
- When you have all 9 pieces you can combine them and get a very special decorative dinosaur block (statue)
The only other thing I can think of that usually gets buried are pots of coins. I love the fossil idea though! That'd be a neat trophy.