Utilize the input text as a context reference, choose the right relationship between Lonmin 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.

Mid-cap gold mining stocks nosedived, with Centamin (Toronto: CEE.TO - news ) falling 9.1pc to 53.6p, Lonmin (LSE: LMI.L - news ) 4.2pc off at 77.7p and Acacia Mining (Other OTC: ABGLF - news ) edging 13.7pc lower to 239p.

Answer: industry