I referred your query to the geologist who put me onto Cardinal and he responded:
The rock is not as hard as granite – in fact I understand it has a low work index which lends itself to much easier mining and milling than granite. The poster should contact the company…
I'm out of the country for a while, but perhaps someone can contact them on 08 9322 6600 as would be a good query to put to bed.
CDV Price at posting:
20.0¢ Sentiment: Buy Disclosure: Held