Around 1990, they were broadcasting Wonder Woman (1975) in my country, and I believe it was in this series where there was an episode revolving around some crystals. Perhaps they were alien crystals? I can't remember exactly.
What I remember is they were powerful and perhaps they hypnotized people who saw them or something. And something else that I remember which isn't related to the plot is, I couldn't watch how it ended because I had to return from my grandmother house to mine, so I couldn't finish it watching it. It's possible that they were a set of 2 episodes that were related, and this episode I couldn't finish watching was the second one, but maybe I'm mixing this memory with another event.
Any ideas which episodes could be an episode (or 2) of Wonder Woman (1975) with some crystals as a core part of the plot?