>I remember catching that once on TV when I was, like, 10 or 11. Might've been an
>old episode of The Outer Limits...
I believe Flangepart is right, it sounds like The Monolith Monsters. The fragments of a meteor start to grow like crystals when they come in contact with water, growing into giant towers that eventually fall over and smash into pieces, which then start growing again. Anyone who came into contact with them would be turned into stone.
Here's the IMDB entry;
The Monolith Monsters And here's a review with pictures;
Monolith Monsters review