Originally Posted by jp99

I can confirm the phone does NOT vibrate on the touchstone. When you have it in vibrate mode, once you place it on the 'stone it switches to a soft ringing sound, like a ringing bell of old time phones. No vibration.

You can hear this for yourself - put the phone on the touchstone, and then switch it to vibrate. It will ring a little to indicate the new mode - you'll hear it.