what assurance, page-6

Not only do they have the phosphate rock but they have numerous other projects in the works.
This is one diverse mining company.

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Previous explorers estimated mineralization at 26.5Mt @ 18% fluorite, 0.1% tungsten and 0.1% tin in a magnetite host. In that restricted resource alone is a contained $2-3 billion of metal. That in-ground metal value equates to about a 5g/t gold equivalent open cut deposit.

This is the largest known fluorspar deposit in Australia, containing about 1% of the world’s known resources. Based on the limited drilling beyond that estimated mineralization, Minemakers believes there is potential to double that mineralization tonnage. There is considerable potential for additional recovery of tungsten and tin, zinc, magnetite, molybdenum, bismuth and gold, as well as for the discovery of sheeted tungsten and tin deposits below the main skarns.

It occurs about 50km by bitumen road south of the export port of Burnie on the Tasmanian north coast. It has excellent infrastructure being close to a hydro power station and is in an area of relatively low conservation stature.
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You might think 1% sounds like a small number. However 1% of the entire worlds known resource of flourspar is quite significant.

MAK also announced re-assaying by different techniques had confirmed that the previously reported tungsten grades from drilling at Storey's Creek, Tasmania were "erroneously low"

They are currently re-assaying a number of projects as they feel the previous techniques have not given correct results.

As yellowcake said. Do your own research.

Karoshi here is a link to their website ( just in case you can't find it )lol.

http://www.minemakers.com.au/