Gold Concentrate
From Eco - English Wiki
Gold Concentrate is created by purifying Crushed Gold Ore in one of the two different crafting stations. The crafting stations come with different ratios, labor cost and time cost. The process to make Gold Concentrate also gives a byproduct of Wet Tailings which is a pollutant. Gold Concentrate is the last step in the production line for Gold Bar.
The two crafting stations that can be used to make Gold Concentrate are ranked as follows:
Level 1: Rocker Box
Level 2: Froth Floatation Cell