Crystals

The official description says a new Antarctic mining zone arrives every hour. Zone names are not published ahead of time. Read the zone board in your server after the hour.

No working code is confirmed. The experience description does not list one, and strings published for other mining games will not work here. A code field location is also not confirmed.

Climb. Guides and gameplay agree that digging straight down does not improve crystal rarity. Height is the progression bar, and the cold is the limit on that height.

Buy the upgrade that matches why the last run stopped. Climb Higher (warmth) if the cold or your health ends it. A better pickaxe if rock or a crystal will not break. Carry More (backpack) if the bag fills while you are still safe.

Place spare crystals in the garden for digging luck. Like the experience and join the PolarMine Games group for a stated +1 Mining Luck. The description does not publish how much luck each garden crystal adds.