Utilize the input text as a context reference, choose the right relationship between 'gold mine' and 'gold' from the options.
Options: location of formation, member of, legal form, product/material produced

The mine began production in 2013, and is the only primary gold mine in the world with annual production of more than one million ounces of gold (100% basis), at all-in sustaining costs below $700 per ounce.
product/material produced