This brings the total funds raised in the offer to more than $3.231 million.
The company remains focused on its Merlin Diamond Mine in the Northern Territory, which has a history of producing large diamonds.
Australia's largest ever diamond of 104.7 carats was recovered from the mine.
Merlin is processing kimberlite ore through its new Tomra X-Ray Transmission (XRT) machine.
By using this new technology, the company aims to enhance larger diamond recoveries and reduce operating costs.
The machine is also expected to recover more low luminescing diamonds than previously possible.
Recovery of large diamonds was not previously possible due to equipment limitations.
The mine comprises 13 known diamond-bearing kimberlite pipe vents on the mine lease, nine of which have been historically mined.