From Dark and Darker Wiki
I can socket a gem to overwrite its power.
Trader
All merchants restock every 30 minutes. (12:00, 12:30, 01:00, ...)
Goldsmith is a Trader that buys and sells items in the game.
Service
Allows the player to replace certain rolls on gear they acquire in exchange for a gem and gold fee corresponding to the rarity
Offered Rolls
| Rarity | Cost (Gold coins) |
|---|---|
| Poor | 10 |
| Common | 20 |
| Uncommon | 30 |
| Rare | 50 |
| Epic | 100 |
| Legendary | 150 |
| Unique | 200 |