Just how much does Mrs. Gingrich’s diamond ring cost?

Following up on the news that man-of-the-people Newt Gingrich has owed as much as half a million dollars to Tiffany’s, Slate got a photo of Mrs. Gingrich's very nice rings. So I showed the photo of the two rings, one diamond and one pearl, to a gem expert. He told me that the pearl is hard to tell, but the diamond looks to be about 5 carats in a "round brilliant," and if it's from Tiffany's it could easily be $300,000 to $500,000 depending on the quality.

It's good to be Newt.

UPDATE: When it rains it pours. Newt and the current Mrs. got a box of confetti dumped on them today.  And it's all on video.