Subject: What is the resonant frequency of granite or quartz?

I have read about resonance as relates to a glass, or the Tacoma narrows 
bridge, and I have also read that John Worrel Keely was able to shatter Quartz 
veins using resonance.  I know you can buy artificial quartz resonators for 
electrical purposes, and that they have a specific resonance.
What is the resonant frequency of granite and quartz, and how is it calculated?

Also I believe the resonant frequency of water is somewhere around 2450 
Megahertz, but how would you calculate the resonate frequency of particular 
compounds, such as salt, or the resonant frequencies of metal forms such as the 
drawbar on a semi-trailer?

Your time is much appreciated,


Mick.

Re: What is the resonant frequency of granite or quartz?