Utilize the input text as a context reference, choose the right relationship between Gemfields and mining from the options. Options: product/material produced, manufacturer, distributed by, industry, position held, original broadcaster, owned by, founded by, distribution format, headquarters location, stock exchange, currency, parent organization, chief executive officer, director/manager, owner of, operator, member of, employer, chairperson, platform, subsidiary, legal form, publisher, developer, brand, business division, location of formation, creator.

One mining stock that does appear to be worth buying right now is Gemfields (LSE: GEM).

Answer: industry