1 Definition
1.1 Definition
Essexite which is also known as nepheline monzogabbro, is a dark gray or black holocrystalline plutonic Iigneous Rock
Kimberlite is a rare, blue-tinged, coarse-grained intrusive igneous rock, which sometimes contains diamonds and is mostly found in South Africa and Siberia.
1.2 History
1.2.1 Origin
USA
Kimberley, South Africa
1.2.3 Discoverer
1.3 Etymology
From the locality in Essex County, Massachusetts,US
From Kimberley + -ite, from the name of the South African town of Kimberley where the rock was first found.
1.4 Class
Igneous Rocks
Igneous Rocks
1.4.2 Sub-Class
Durable Rock, Hard Rock
Durable Rock, Hard Rock
1.5 Family
1.5.1 Group
1.6 Other Categories
Fine Grained Rock, Opaque Rock
Coarse Grained Rock, Fine Grained Rock, Opaque Rock