Definition
Origin
Discoverer
Etymology
Class
Sub-Class
Group
Other Categories
Norite is a mafic intrusive igneous rock composed largely of the calcium-rich plagioclase labradorite, orthopyroxene, and olivine
From the Norwegian name for Norway, Norge
Coarse Grained Rock, Opaque Rock
Taconite is a low-grade iron ore which belongs to sedimentary rock and containing about 27% iron and 51% silica
Western Australia, Minnesota
From the name of Taconic Mountains in New England
Durable Rock, Medium Hardness Rock
Coarse Grained Rock, Opaque Rock