Story of serpeech told by Sherpa had all the qualities of a fairytale that talks about eternal love. love that very few are fortunate to have.
however it seems the Raja and Rani shared that kind of love. Love that prompted Rani to send the serpeech to the top of Mt Everest so that her beloved can still see her face in that diamond.
Story is about the faith of a person and the belief in the love she shared with her husband. Her need to be connected with her beloved in her own way. Maybe that might be one thing that keeps the Rani going that the Raja is still with her. Raja still sees her.
Sherpa said it right. If the story is true that serpeech indeed is a very sacred thing. A symbol of eternal love shared between two people which the living person wants to continue even after the other person passed away in their own way.
Arjun's expression was worth seeing after the story. He is feeling the guilt to take something like this. I guess he didn't know the story behind the serpeech, only its value. Because Rungta measures everything in hardvalue terms not in soft value terms