Berezium Mine

"'Named after the scientist that discovered it, Berezium is worth a ton of money. However, the mine is MASSIVE.'"

Overview
Berezium Mine was the largest mine in Miner's Haven, until the Tiny Iron Mine was released. It was named after Berezaa (the creator of Miner's Haven). This is the first mine a user can acquire that has a random ore value (in this case $50 to $200), unless they have the Industrial Rainbow Mine, which requires uC or can be found in boxes, which even someone who just found the game can get.