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I saw on TV in the late 90s what I think was a movie (or possibly TV show) involving some manner of prehistoric adventure. I distinctly remember only a few things: 1. I know for sure it was either in or after 1997 and before the 2000s. 2. In one scene, several adventurers (mercenaries?) are being attacked by some sort of pterodactyl-like flying monster. They are dressed somewhat like pirates (tunics, breeches, leather boots, etc) and when they are attacked, one of them drops some kind of glowing gem out in the open when they run for cover. Their leader orders one of them to go out and retrieve it, but instead he uses a gun to threaten another subordinate and make him try to get it instead. As soon as the mook runs out to grab the gem-thing, the monster swoops down and grabs him. 3. In another scene, there's a black monk or priest of some kind who seems to be fighting a velociraptor-like dinosaur that's trying to enter a room (of a temple or something) through a dimensional-portal.
I've tried using every combination of keywords you could take from this to search on Google, but so far haven't come up with anything.