The Silver Ferns have claimed their sixth Fast5 series title, coming away with a 41-16 win in Melbourne.
The Ferns were rampant on the second day, coming away with a 26-16 win over Jamaica and a massive 52-27 win against Malawi.
The Diamonds were unbeaten throughout the competition, winning all of their games on day one before appearing just as strong on day two.
New Zealand showed no scars from the 32-29 defeat suffered to the Diamonds in the last game of day one, this time reversing fortunes to defeat Australia and claim the title.
A tight first quarter saw the two sides level at 5-5. Maria Tutaia was the star for New Zealand, helping reduce the deficit after the Silver Ferns trailed early on.
Tutaia grabbed the second period with both hands, scoring 12 points in less than 35 seconds to start the quarter. The clinical shooter ensured New Zealand went into half-time with a 23-11 lead.
More calm shooting saw New Zealand finish the third quarter 33-16 in front, however Australia had saved their powerplay for the final period of play.
Heroic defence from the Silver Ferns meant that Australia were kept scoreless for the entire fourth quarter, while Tutaia and the other shooters made the Diamonds pay at the other end.
The win gives New Zealand a sixth Fast5 crown in seven years.