First of all, congratulations, I hope she says yes. There's some things you should know, though, when out shopping for the ring, if you're into that kind of thing. The ring thing.
Here's some terms specific to diamond shopping you should be able to talk with your jeweller.
via www.gemnation.com
Now a Blemish is a mark or flaw on the outside of a diamond. This can be from the original rough-cut gem, or a mistake when it was cut.
