I went looking: silver to gold ratio is generally obscured, the prefered term used is "Gold equivilent "ounces, rather than saying how much gold & how much silver. But in 2017 AGM I do see a reference to about 204,000 oz gold & 800,000 oz silver. 4:1. Given that that ounce of gold is $NZ 1900, and its acompanying 4 oz silver is $NZ 88, you can see why unfortunatly it hardly matters.