Lying is a great way to start a relationship. Then when she goes to get the ring insured or tries to add it to your homeowners or renters insurance and the appraisal comes back you can have the informed, rational discussion of your thought process with no fall out. Just in case someone wants to avoid that approach, it might be helpful to have some specific arguments. I think it is good to point out what you could use the money for instead. If you show that the money could be used to strengthen your relationship over the long term, that should show deep concern and love for your partner.
> > From reading this, just show it to her. It says people can't spot the difference.
> Lying is a great way to start a relationship.
It sounded to me like the advice was "show her the fake diamond, so that she can see that it's visually indistinguishable from a real one" rather than "present her the fake diamond as a real one".