Months ago when gold was near $700 I posted this table on another board, now updated to current metal prices:
GRZ Value per Share Version 2008Mar. Data from presentation
Not accounting for operating costs, royalties, taxes and subjective (Chavez?) discounts or other metals.

Gold Price/oz. ($700) ($900) $1000
Copper price/lb. ($3.40) ($3.50) $4.00
Gold in ground(oz.) 10,400,000
Value of gold ($7,280,000,000) ($9,360,000,000) $10,400,000,000
Copper in ground(lb.) 1,300,000,000
Value of Copper ($4,420,000,000) (4,550,000,000) $5,200,000,000

Using recovery for both 83%

Recoverable Gold ($6,042,400,000) (7,768,800,000) $8,632,000,000
Recoverable Copper ($3,668,600,000) ($3,776,500,000) $4,316,000,000
Total Metal Value ($9,711,000,000) ($11,545,300,000) $12,948,000,000
Number of Shares 71,000,000
Value per share ($136.77) ($162.61) $182.37