Name this film - if you can.?

OK, this is a long shot and there are scant details to go on. My wife claims to have watched a film fitting this description with me, but I'm sure I'd remember it. Anyway, here goes.

My wife recalls a scene where a monkey steals some jewelery from a house and is pursued into the jungle. One of the people following the monkey finds a strange stone and picks it up - leaving markings on his hand.

The stone is linked to a curse, the monkey is actually a person who was previously cursed. The curse now afflicts others who touch the stone, turning them into animals.

Among these my wife recalls a woman who is turned into a snake - and subsequently gets thrown into a glass tank and captured there.

In the end the curse is broken (with the woman still in the tank) and they all live happily ever after, kinda thing.

Now I'm usually pretty good with movies but this thing has me stumped. I've tried a variety of keyword searches on IMDB but to no avail. Is this even a real movie?