"I'm so pleased to be able to give back. It's the least I could do."
Flynn has previously been involved with the foundation by meeting with a group of survivors at a breakfast event with Toni Street and by taking part in charity walks in her home town of Tauranga.
Williams says the idea to auction the earrings came about during the design process and stems from a shared support of the foundation.
While Flynn explains that she was "a little bit busy" at the Olympics when the earrings and dress were being made, she was thrilled when she was presented with the diamond, white topaz and sterling silver jewels.
"I was blown away when I saw them. They're stunning. I was lucky to get to wear diamond earrings like that. It was nice to get a bit glammed up."
Flynn paired them with a handbeaded gown made for her by Millicent.
The auction ends at 9pm on Monday night.