It's a pretty vague description, but it reminds me of a handpan drum, or vibraphone.
Anything can rattle your bones when in played loud enough, but if you're looking for a way to create the kind of sound that fills the room without being loud, try adding chorus, reverb and stereo delays.
I was playing around with such the other day, in making an effect chain that would catch the tail of a reverb and then amplify it into an endless delay loop where the entire sound is made from the effect of something that doesn't exist anymore.
Lad mig gætte, kurset var i "præsentationsteknik og personlig fremtræden".