Where is Rosalie's Cullen Crest Pendant?

Rosalie's pendant is my favorite Cullen Crest accessory, aside from the Edward's wrist cuff (but then again, I love that thing for an entirely different reason ;p). So imagine my curiosity when the pendant mysteriously disappeared.

It was last seen at Bella's birthday disaster. When the Cullens came back towards the end of New Moon, Rosalie wasn't wearing it anymore.

In Eclipse, Rosalie appeared several times sans the pendant.

However, there were also scenes wherein she was seen wearing a necklace.

But upon closer inspection, the pendant was just that. A mere pendant, not the Cullen Crest one.
What do you guys think happened to it? It just seems impossible to me that the costume department merely ignored the fact that it went missing and didn't even bother to come up with a replica. I read somewhere that the wrist cuffs the guys wore have a dozen of "doubles". Well I hope that the pendant makes a reappearrance in Breaking Dawn, with possible additions of Bella and Renesme's Cullen crests.
As if the Brazil pictures weren't enough, there's another reason to look forward to November 2011!

twifans