(IDEX Online) - Thirty-one workers were sacked for stealing diamonds from Anjin Investments in Zimbabwe's Marange fields last year.Rough gems were taken during ore processing at Chiadzwa in what is described by The Manica Post newspaper as a "well-orchestrated" operation.The perpetrators, among them some security officers, passed the stolen diamonds on to diamond dealers."A total of 31 employees were relieved of their duties by the company after being found on the wrong side of the code of conduct," said China-based Anjin Investments."In line with the security global trends, Anjin has, over the years, been strengthening its security. In this regard, the company has been installing and upgrading its integrated security systems."The company is taking no prisoners in securing the product and the equipment."