2d6 Result	Defined Trade Good	Unit Increment	Base Price GP
2	Lead/Zinc/Tin	1d6 x10	1
3–5	Copper	1d6 x 10	2.5
6–8	Nickel/Silver	1d6 x 10	5
9–11	Gold/Iridium	1d6 x 5	7.5
12	Platinum	1d5 x 2	10

These are unrefined ores.