The grades of some of the stockpiled material processed at...

The grades of some of the stockpiled material processed at Newmont/OGC's Waihi mine were crazy.

If you recall:

Fifty tonnes of stockpiled Talisman ore were despatched to Newmont Mining’s (NYSE:NEM) treatment facility at Waihi were analysed and found to contain 64.5 ounces of gold at a recovered grade of 42.56g/t and 227.3 ounces of silver at 150.01g/t.

The same article also discusses the economics of the bulk sampling project:

Total capex is estimated at A$1.7 million, which fully funds the project for 18 months including corporate overheads.

This should produce approximately 6 kilograms of gold per month once at a steady state of production is achieved.

So we're talking about 211 ounces per month. At roughly $1800NZ per ounce that's $379,800 per month revenue or $4,557,600 per year from bulk sampling.

That's at Talisman, which they will clearly put the money into setting up full scale mining - probably why Amer International is on the scene too

And what about across the road at Rahu with Newcrest?