Selling Crystals in Mine Antarctica — Cash, Weights and Timing

How selling works

Selling converts mined crystals into Cash, the game’s main currency. The official loop from the game description: mine crystals, then “sell crystals for cash”. Three facts drive the whole flow:

1. Crystals have weight. Official images show crystals weighed at 96.4 kg and 98.4 kg, and the number appears in-game when you mine. Weight is what your backpack budget spends.
2. The backpack is the run limit. When the weight budget is full, mining stops paying until you sell — see the backpack guide.
3. The selling point converts everything. Sell your load, get Cash, reinvest in upgrades or park spares in the garden.

Official artwork: a 98.4 KG rainbow crystal cluster — the kind of heavy, rare find worth the climb.

What crystals are worth

Here is the honest line: the game does not publish a value table. What you can rely on:

• Weight scales value. Heavier crystals of the same kind bring more Cash. The exact Cash-per-kilogram for each crystal type is shown in-game when you sell.
• Rarity seems to pay more. The description promises “rare crystals”, and rare finds — like the rainbow crystals in official artwork — are visibly different from common ice-colored stones. How much more they pay is shown in-game, not officially documented.
• Hidden treasures are official. “Uncover hidden treasures” is in the description. What they are worth is in-game knowledge; treat third-party treasure tables as unverified.

When to sell: three timing rules

1. Garden before you sell. If today’s haul includes spares of a crystal you already own, park those in the garden first — permanent luck beats one-time Cash for duplicates you don’t need.
2. Sell before the hour mark. The hourly zone rotation gives you a fresh zone every hour; enter it with an empty backpack and full Warmth.
3. Sell before logging off. An unsold crystal is locked money. Cash can go to upgrades; crystals in a backpack earn nothing overnight.

Selling FAQ

• Do crystals sell themselves when the zone changes? Nothing official says so. Assume they do not — sell manually before the hour.
• Should I sell heavy common crystals or save everything for the garden? Both: spares go to the garden, the rest to Cash. The garden wants duplicates, not your whole run.
• Is there a sell-all button? Not confirmed. The selling point converts your carried load — walk up and sell when the backpack is full or the run is done.

For the other half of every run — where the Cash should go first — read the upgrade priority guide.