What's the HPA project worth?

Hi Folks,

I know the HPA project in S Australia costs 6m over 5 years for our 75% share, but what is it worth? Does anybody know or could anybody hazard a guess? How much does halloysite sell for? And how much does it cost to get it out the ground and into the hands of the seemingly growing line of Asian consumers.
Is there an exchange with quoted halloysite prices? Can I trade it like a commodity future?
I see words like 'significant' in the releases, but what does that actually mean in terms of net profit for Andromeda?
I would be delighted to hear from anyone that actually knows!