Gouge—A selvage of clay between vein and country rock.
Grade—The inclination of a ditch, etc.
Grating—Perforated iron sheet, or bars with spaces.
Gravel—Broken down, rounded rock fragments.
Ground Sluice—A gutter in which gold is washed.
Iridescent—Showing the hues of the rainbow.
Litharge—Proto oxide of lead.
Long Tom—A machine for saving alluvial gold.
Marl—Clay containing lime.
Miner's Inch—An arbitrary measure of water regulated by local custom.