LONDON -- It's always worth keeping an eye on the earnings forecasts for your favorite companies, especially if you use forward price-to-earnings (P/E) ratios to gauge when to buy and sell your shares.

You never know, if City brokers have been revising their projections of late, your investments may not be as cheap -- or expensive -- as you think!

Today I'm looking at the earnings per share (EPS) forecasts for Randgold Resources (LSE:RRS) (NASDAQ:GOLD), the FTSE 100 gold miner. All my figures are courtesy of S&P Capital IQ.

The consensus for 2012 is for earnings per share of 316 pence, which puts the 5,870 pence shares on a lofty forward P/E of 19.

The estimates also suggest earnings may rise to 424 pence per share for 2013 and then climb to 520 pence per share in 2014 before falling to 255 pence the year after.

The data from S&P Capital IQ also indicates Randgold Resource's revenues may climb from £862 million in 2012 to £1.07 billion in 2013. Revenues may then then rise further to £1.3 billion in 2014.

All told, the forecasts aren't great and profits depend greatly on the outlook for gold prices. That said, that P/E of 23 looks like the market is hoping that gold prices may continue to shine for the next couple of years, at least.

Whether these projections make Randgold Resources a buy, a hold, or a sell is, of course, up to you. To put the company's multiple into perspective, the FTSE 100 at 6,066 trades on a P/E of around 11.9.

But even if you already have Randgold Resources in your portfolio, there are plenty of other great stocks out there to consider, too. Some of them are listed in our special in-depth Motley Fool report "8 Top Dividend Plays Held by Britain's Super Investor."

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David Kuo has no position in any stocks mentioned. The Motley Fool has no position in any of the stocks mentioned. Try any of our Foolish newsletter services free for 30 days. We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.