Before writing this review I looked up emeralds in Wikipedia and found that Paul Douglas was wrong when he said during the film that emeralds are only found in two places, Colombia and the Soviet Union, specifically Siberia. They are found in all kinds of places including some areas of the USA. Would that were the only thing wrong with this film.
Still Colombia is the area best known for it and until recently when you thought of Colombia you thought of emeralds and coffee. Now sad to say you think drug cartel. But back in 1954 it was emeralds that was on the minds of adventurers Stewart Granger and Paul Douglas. They've discovered an abandoned mine that they think was abandoned prematurely. And the only place to get laborers is from the nearby coffee plantation owned by brother and sister Grace Kelly and John Ericson.
Young Ericson is hot to trot to help Granger and Douglas, Kelly less so. But she does have an eye for Granger even with both men pursuing her.
And of course there's bandit chief Murvyn Vye who actually does own the land where the emeralds might be found. But he'd just as soon let others do the back breaking work of digging them out.
Now with all the information I've given I think 99% of viewers would see where this one is going. In fact that's Green Fire's main problem, it's your basic routine action/adventure flick on which MGM decided to spend a ton of money. For one thing it's best asset is the color location cinematography in the Colombian jungles. After King Solomon's Mines and The African Queen, American audiences would not accept back lot jungles any longer. Note that Stewart Granger was the star of King Solomon's Mines and he got first crack at every jungle picture that came along after that.
Green Fire is hardly as good as King Solomon's Mines. Grace Kelly seemed pretty distant in this film, looking like she was a Philadelphia débutante rather than a coffee plantation owner. She did a flock of good films this year, Rear Window, The Bridges At Toko-Ri and her Oscar winner The Country Girl in 1954. Green Fire just isn't in the class of the others.
In short, admire the flora and fauna of Green Fire and the story is something you can live with.