A better than average B movie, Monstruos De Piedra (The Monolith Monsters) has a simple plot device: meteoric crystals that keep growing on contact with water provide a straightforward adventure with fairly well-integrated stock footage and bargain special effects (miniatures) that work well for the budget given. By this time Universal was looking to keep things as cheap as possible, but its later movies would suffer far worse at the hands of cost-cutting number crunchers. This movie would make a terrific remake. Just add suped up action, and killer special effects, and it would be a natural for a summer blockbuster.
