Ruffels, who finished 6th in the stroke-play qualifying earlier in the week, easily accounted for American, Haylin Harris, in her morning encounter and her afternoon match was an even more comfortable affair, winning over well-credentialed, Californian Brooke Seay, by a massive 6&4 margin.
Ruffels had won her opening round match yesterday with an easy 5&4 victory and in tomorrow’s quarter-finals she will play American Kenzie Wright.
Other Australians to have made the match-play phase of women amateur golf’s most significant championship, Doey Choi and Stephanie Kyriacou, were bundled out in round one.
An Australian has yet to win the US Women's Amateur Championship, Tasmania’s, Lindy Goggin, and South Australian, Anne Marie Knight, having finished runner-up in earlier years.
Ruffles, the daughter of former Australian tennis star Ray, is also the brother of another young golfing talent Ryan.
Want video tips delivered straight to your inbox? Subscribe to iseekgolf.com newsletters.