Der blaue Diamant
A legendary blue diamond draws five friends on an arduous expedition to the jungles of Thailand. Things go wrong after a murder, with one friend going to prison. The friends are reunited after seven years when one is kidnapped.
Starring Pierre Brice, Ernest Borgnine, Barry Newman, Harald Leipnitz, Julia Kent, Sonja Kirchberger, Wilfried Baasner, Christine Schuberth, Laura Johnson, Brent Huff
It's a action & adventure movie, and has a rating of 2.3 out of 10 from Imdb which is fairly low for this kind of movie.
Watch it here
Not found streaming from Finland.