Also found in: Dictionary, Thesaurus, Encyclopedia, Wikipedia.

be sitting on a gold mine

To have immediate access to a plentiful amount of something valuable or desirable, especially something that one has not yet profited from. Who knew that my grandfather was sitting on a gold mine of priceless antiques all these years? If your social networking site is attracting millions of new users every month, then you guys are definitely sitting on a gold mine.
See also: gold, mine, on, sitting

gold mine

1. Literally, a mine where gold ore is found and excavated. Also written as "goldmine." More than 500 workers have become trapped in a gold mine after a minor earthquake cause the mineshaft to collapse.
2. An enterprise, opportunity, or resource that is or has the potential to be extremely profitable. The social networking site has since become a veritable gold mine, attracting millions of new users every month and generating staggering amounts of money from ad revenue. If we can secure the merger deal with the pharmaceutical giant in London, I'm sure it will prove to be a gold mine!
3. A person, place, or thing containing a plentiful amount of something valuable or desirable. Who knew that my grandfather's attic would turn out to be a gold mine of priceless antiques? This database is a gold mine for anyone interested in medical research trials. Our professor is a gold mine of information about medieval French literature.
See also: gold, mine

gold mine of information

Something that yields a lot of valuable or useful information. I've never met any of these relatives before, so your photo albums will be a gold mine of information.
See also: gold, information, mine, of
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

(a) gold mine of information

Fig. someone or something that is full of information. Grandfather is a gold mine of information about World War I. The new encyclopedia is a positive gold mine of useful information.
See also: gold, information, mine, of
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.

gold mine

A rich, plentiful source of wealth or some other desirable thing, as in That business proved to be a gold mine, or She's a gold mine of information about the industry. [First half of 1800s]
See also: gold, mine
The American Heritage® Dictionary of Idioms by Christine Ammer. Copyright © 2003, 1997 by The Christine Ammer 1992 Trust. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
See also:
References in periodicals archive ?
He has been "living in the house since 1973" and was clueless about the Goldmine Buildcon Private Ltd.
The Volvo Penta engine was supplied to the goldmine by local dealer, Delta Industrial.
Dominic Goold, managing director of Goold Estates, said: "Goldmine provides young people with a much needed resource in Walsall town centre as well as a number of employment opportunities."
The early paced Goldmine Ramble was no stayer, despite being by the stamima influence Smooth Rumble.
Brian Goodman, the company chief executive officer, said, 'This enables our company to focus its efforts on its new business of legal Online Casino operations while at the same time giving existing shareholders a special stock dividend; creating the opportunity for shareholders to benefit from the Online Casino business and at the same time be able to participate via their dividend shares as shareholders in Goldmine Resources PLC, which will continue its gold exploration activities in Cambodia.'
TELECOMWORLDWIRE-29 February 2008-FrontRange selects Runware to provide trials for Goldmine Mobile(C)1994-2008 M2 COMMUNICATIONS LTD
The latest release of wMobile, a mobile telephone client for the GoldMine CRM system, allows records of mobile e-mail correspondence to be integrated into an organizational CRM system.
On the eve of director Todd Haynes' new film, the Bob Dylan biopic I'm Not There, Outsiders re-visits his 'David Bowie biopic' Velvet Goldmine. Festival director Matt Fox describes it as 'Citizen Kane meets The Rise and Fall of Ziggy Stardust and the Spiders from Mars'.
"Nalunaq Gold Mine is Greenland's first goldmine. Since NunaMinerals discovered the Nalunaq gold deposit in 1992, we have taken part in developing the project, over the years gaining valuable knowledge, insight and experience in developing an exploration project towards commencing mining production.
FrontRange Solutions have confirmed the availability of GoldMine Premium Edition (PE).
Responding to customer requests for tighter integration between front- and back-office data, FrontRange Solutions has announced the general release of GoldMine Plus Accounting 4.0.
Loaded with details of the financing, casting, production, and distribution of Killer films like Hedwig and the Angry Inch, Happiness, and Velvet Goldmine, A Killer Life follows the production company from its bag-lunch days to buffets at Cannes.
The tropical South Asian island of Borneo is an ecological goldmine of exotic species, many of which are found nowhere else.
Meticulously researched, richly illustrated, and racing away with every record, trivia item and statistic from the first outing at Silverstone in 1950 to present-day performances, it's the work of David Hayhoe and David Holland, and a goldmine for Grand Prix fans.