Definition
Icelandite belongs to volcanic igneous rocks which is rich in iron and belongs to andesite rock
Litchfieldite is a rare igneous rock which is coarse-grained, foliated and a variety of nepheline syenite, sometimes also called as nepheline syenite gneiss or gneissic nepeheline syenite
History
Origin
Iceland
USA
Discoverer
Ian S. E. Carmichael
Bayley
Etymology
From its origin place near Cenozoic volcano near the parsonage Þingmúli in East Iceland
From its occurrence at Litchfield, Maine, USA
Class
Igneous Rocks
Igneous Rocks
Sub-Class
Durable Rock, Hard Rock
Durable Rock, Medium Hardness Rock
Family
Group
Volcanic
Plutonic
Other Categories
Fine Grained Rock, Opaque Rock
Coarse Grained Rock, Opaque Rock