De Grey Mining Limited is an Australian exploration and mining company that focuses on gold exploration and development. The company has a competitive edge in the following ways:

1. High-grade gold deposits: De Grey Mining Limited has discovered high-grade gold deposits in its Pilbara Gold Project, which is one of the largest gold deposits in Western Australia. The company's exploration efforts have resulted in the discovery of several gold deposits, including the Hemi Gold Discovery, which has a resource estimate of 6.8 million ounces of gold.

2. Strong financial position: De Grey Mining Limited has a strong financial position, with cash and cash equivalents of AUD 133.5 million as of June 30, 2021. The company has raised funds through equity placements and has no debt, which gives it the financial flexibility to pursue its growth strategy.

3. Experienced management team: The company's management team has extensive experience in the mining industry, with a track record of successful exploration and development projects. The team has a deep understanding of the geology and mineralization of the Pilbara region, which gives the company an advantage in identifying and developing high-grade gold deposits.

4. Strategic partnerships: De Grey Mining Limited has formed strategic partnerships with major mining companies, including Novo Resources Corp and Kirkland Lake Gold Ltd. These partnerships provide the company with access to additional resources and expertise, which can help accelerate the development of its projects.

Overall, De Grey Mining Limited's competitive edge lies in its high-grade gold deposits, strong financial position, experienced management team, and strategic partnerships. These factors position the company well for future growth and success in the mining industry.