Barbie & pink diamond necklace

A Barbie doll with a one carat pink diamond necklace is expected to bring the most amount of money ever for a Barbie doll when the doll is auctioned off with proceeds going to * cancer research foundation:

http://today.msnbc.msn.com/id/39542114/ ... ?gt1=43001

The barbie doll is expected to sell for $300,000.00 or more at auction.

In the interest of helping out the cause, I hope it does well. I can't help but feeling that's a bit of an odd way to raise the money, though. Not so much the auctioning, but attaching a diamond to a doll. I would expect the diamond would have been more valuable separately.