The 15-year-old, teaming up with Isabella Hosken, fell short of gold against Queensland's Kira Bourke and Caysee Wilson by three shots, losing 17 shots to 14.
Cartwright was also a member of a the Victorian fours side, along with Amity Bickley, Alana Flapper and Sophie Kurzman, with the team finishing fourth in the competition after losing to third-placed side Queensland, 11 shots to nine.
Cartwright said it had been a fantastic opportunity.
“It's the second time I've taken part in the event, but it was pretty special to be a part in one closer to home,” she said.
“It's always an honour to get to compete against some of the best bowlers in the country, you get to test yourself and really see how your game stacks up against others who are involved in the sport as well.”
Cartwright said claiming the silver medal was the highlight of the event.
“It's definitely the main thing I take away from it,” she said.
“Being able to have success in an event like that, it's something you can always be proud of. To walk away from an event like this with a bit of success is a great thing.”
Though the success on the greens is huge for Cartwright, she said there is also a lot to gain off the greens.
“I think you learn not to doubt yourself,” she said.
“You need to go into an event like this with confidence in your own ability and where it is going to deliver you. You may take away a medal, you may take away some new friendships, but you'll always get something out of it.”