For the most part, cobalt is also mostly extracted as a bi-product of other metals. In 2017, around 69 percent of the world’s cobalt was mined as a copper bi-product and 29 percent as a nickel bi-product. With the price of those two metals falling consistently, a considerable amount of their global production has been shuttered for being uneconomic. This has tightened global supply for cobalt as a result, and put additional upwards pressure on prices.
This paragraph from the article is very relevant to COB's cobalt deposit, being in the 2% of resources that are classifed as primary deposits.
