Blood Diamond font here refers to the font used in the poster of Blood Diamond, which is a 2006 American political war thriller movie that tells the story of several different people trying to get their hands on a valuable diamond during the Sierra Leone civil war.
The movie title in the poster is probably set in Helvetica Neue Com 65 Medium. The font is a commercial one and you can view more details about it here.
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The Helvetica font identified above is not available for free, please follow the link above and purchase the font. Meanwhile, you can take a look at our collection of fonts for cars, pop music and apparel as well as round-ups of new & fresh fonts around the web.