Grade Unit

The calculated values for Grade fields may be weighted according to either:

• the block volume (m³) or
• the block tonnage (t). The tonnage option includes density in the calculation (often important for coal).

When you select a Grade unit, a conversion to a Mineral unit can be performed. Mineral value is equal to the Grade field multiplied by volume (m³) or tonnage (t).

%	Percent	lb	Pounds
ppm	Parts per million	oz	Troy Ounces
kg	Kilograms	carats	Carats
g	Grams	dwt	Pennyweights

If you have chosen an Undefined, Percent or ppm Grade unit, the Mineral unit input will be disabled (since the unit is unknown).