Definition
Origin
Discoverer
Etymology
Class
Sub-Class
Group
Other Categories
Ijolite is an intrusive igneous rock which is composed mainly of nepheline and an alkali pyroxene, usually aegirine-augite
From the first syllable of the Finnish words Ii-vaara, Iijoki, &c. commonly used geographical names in Finland, and the Gr. Xiflos, a stone
Durable Rock, Medium Hardness Rock
Coarse Grained Rock, Opaque Rock
Larvikite is an igneous rock and a variety of monzonite, notable for the presence of thumbnail-sized crystals of feldspar
From the town of Larvik in Norway, where this type of igneous rock is found
Coarse Grained Rock, Fine Grained Rock, Medium Grained Rock, Opaque Rock