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Boz isn't the only one who can copy and paste:

COPPER: Anything over 100 metres and 1% copper equivalent or better is considered to be high-grade. For example, Serengeti Resources announced 119.6 metres of 0.9% copper equivalent (copper plus gold values added together) at depths from 180 to 300 metres. The stock then increased from $0.30 to $1.50 after those drilling results were reported.

NICKEL: This valuable metal doesn’t usually occur in nature as a bulk tonnage target since most bulk tonnage mines contain 100 million tonnes of ore or more, and most hard rock nickel deposits are less than 10 million tonnes in size. Therefore, anything over 20 metres in thickness (significantly less thickness than other commodities) and 2% nickel grade or better would be reasonably considered high-grade. Example: In September 2007, Noront Resources released two nickel intercepts from shallow drilling between 80 metres and 150 metres deep, with a section of 71 metres grading 1.8% nickel and 1.5% copper. The stock moved from $0.80 to $4.00.

GOLD: It is usually reported in grams per tonne (or g/t), although sometimes, in the US, it is in oz/ton. A gram of gold is worth about $25, so 2 grams or better would be viewed as high-grade for bulk tonnage mining. One hundred metres of good grade is again good criteria for thickness.