Pendulum fortune telling _ Is the pendulum accurate?

I want to ask a question about the pendulum ~ I see ~ Thank you ~ {Good answers will be graded ~}

You said it was a pendulum! Can plexiglass have spirituality? ==!

To make a pendulum, the price is second, because the price determines the quality, but the premise must be crystal or semi-precious stone. Without this premise, no matter how beautiful it is, it will not be a pendulum. Have you ever seen a master who tells fortune with a crystal ball and measures it with a plexiglass crystal ball?