Fetching: sass-3.2.19.gem (100%)
Successfully installed sass-3.2.19
Successfully installed compass-0.12.5
Parsing documentation for sass-3.2.19
Installing ri documentation for sass-3.2.19
Parsing documentation for compass-0.12.5
Done installing documentation for sass, compass after 13 seconds
2 gems installed

which compass

/usr/local/bin

/usr/local/rvm/gems/ruby-2.0.0-p247/bin/compass

find /usr/local/ -type f | grep compass

export PATH=$PATH:<Whatever directory where the compass executable is>