The pendant itself is very small, but quite attractive.  It's actually only about 1/4 inch high.  I can't speak for the quality of the diamond (I'm not really a jewelry buff.), but it does sparkle and give the item some pop.

The chain is very thin, feels very cheap, and is not nearly as shiny as the charm that sits on it.  I recommend replacing the chain, but if you're looking for a small, understated but regal-looking piece for low cash ... this would be a good choice to consider.