Cobalt Leaders
Cobalt production is heavily influenced by very large companies often focused on other mining sectors due to most of the world's cobalt being mined as a byproduct of large-scale copper or nickel operations.
According to the US Geological Survey (USGS), Idaho – where Century Cobalt's project is located – represents 1 of only 2 deposit locations in the US where primary cobalt production could occur (i.e., production not as a byproduct of another metal)
The top 5 cobalt producers
Reference sources:
U.S. Geological Survey, Mineral Commodity Summaries, January 2018
Cobalt Investing News, Feb. 21, 2018
Vale website (production and sales in 4Q17)
Google Finance (market cap numbers)