Petra Diamonds, the diamond miner is still catching the eye of Questor in the Telegraph, who has been banging on about the stock for ages (it's currently tip of the year). There are slight worries about the grades of rock ore at some of its mines (this means how many diamonds are found per tonne of rock). On the other hand, the shares are currently at just eight times 2013 predicted earnings (although with no dividend). Questor sticks to his guns and says carry on buying.Tempus in the Times puts an amber light above one of the oldest companies on the FTSE 250, F&C Asset Management - once called Foreign and Commonwealth. Edward Bramson, an activist investor, forced his way into the Chief Executive position last year but the shares have gone down since. His big idea is to cut costs and focus on the high margin products that are doing well. Will he sell Thames River Capital, are the strategic joint ventures with insurance companies going to dwindle? These are significant uncertainties but Tempus notes the shares trade on just nine times earnings and the dividend is a decent 4.5% - interesting, but "highly speculative".Satellite firm Inmarsat gets the cold shoulder in The Times. An embarrassing situation in the US - where its mobile broadband offering started interfering with other networks, like, er, the military's - has seen a decent source of revenue dry up. The next big thing for Inmarsat is providing internet and data services to aircraft but the company is still in the capital spend phase of the project. The shares trade on 11.7 times 2012 earnings, Tempus can't see any reason to buy right now.Please note: Digital Look provides a round-up of news, tips and information that is impacting share prices and the market. Digital Look cannot take any responsibility for information provided by third parties. This is for your general information only as not intended to be relied upon by users in making an investment decision or any other decision. Please obtain a copy of the relevant publication and carry out your own research before considering acting on any of this information.BS