Brian,
I thought your last image was a little underexposed for an image that you wanted to pop/sparkle. There was also quite a strong colour cast in the blues.
I did a very quick edit in PS, I desaturated the blue channel a touch and raised the exposure by 1.5. Result is below.
Hope this helps.
![The question was never asked the price was 7 small diamonds in a band of gold](http://i63.tinypic.com/4iyd6v.jpg)