1. Obtain a piece of crystal glass.
2. Suspend the glass from a string so that it is free to vibrate.
3. Tap the glass gently with a finger or a small object to make it vibrate.
4. Observe the vibrations of the glass.
5. Count the number of vibrations the glass makes in one second. This is the natural frequency of the glass.
The natural frequency of crystal glass is typically around 1,000 to 1,500 Hertz (Hz). However, the exact frequency may vary depending on the type and thickness of the glass.
