"You're a Gem"
"Congrats on the Shiny New Bling"
"I Think You're Brilliant"
"You Sparkle & Shine"
and my cards using some of these sentiments and the stamps...
On this card I printed the sentiment using my computer and Microsoft Word software. The font is Lavanderia (one of my favorites) which you can download for free. You can find it here ... thefonty.com. dafont.com is another great source for fonts and explains how to install your new font for different operating systems.
and one more...
Can you think of other diamond sentiments? I would love to hear them!