I have a tungsten ring as well and wear it all the time when playing guitar without problems. I have on occasion tapped the back of the guitars neck with my ring which makes a fairly loud knocking noise but I have seen no ill effects on my guitar. Perhaps I could use this ring on guitar neck knocking technique for some sort of flamenco musical composition? Hmmmm..
2015 Yamaha CG172F - Flamenco
2013 Francisco Navarro Garcia Grand Concert "Hauser"
2008 Ramirez 125 anos Limited Edition
2002 Ramirez R4
2000 Alhambra 5P