[dijit]

I would say that diamonds as jewellry is a bad idea in general; it is artificially scarce, can be developed in a lab in a more perfect way (in fact, "too perfect" is how jewellers know a diamond has been created artificially) and doesn't shimmer as much as other stones.

I would instead look at Moissanite[0]; looks better, holds it's value a little bit better although debeers has killed a second hand market for this kind of jewellry..

[0]: https://en.wikipedia.org/wiki/Moissanite