Kim K's Engagement Ring -- The Secret Inscription

There are hidden messages inscribed underneath the 16.5 carat diamond on Kim Kardashian's MASSIVE engagement ring ... TMZ has learned.


Sources very close to the couple tell us Kris Humphries had two bible passage etched into the $2 million stunner ... and they each have a special meaning for both Kim and Kris.

So far, we're told, the couple isn't revealing which passages are on the ring.