Sort:  

Welcome to Nichop's Shaft. Here is a complimentary pickaxe.

Q8 - You found some Tin
Q9 - Oooo Platinum but worthless in Cryptoland
Q10 - Nothing but Rock :(

Please try again tomorrow or resteem this post for an extra 3 guesses

N 21
J 31
F22

Another day prospecting
N21 - Nothing but Granite
J31 - Your broke your pickaxe
F22 - Found another pick axe but put your back out mining worthless rock

Have another go tomorrow or resteem this post for 3 more guesses