Definition
Origin
Discoverer
Etymology
Class
Sub-Class
Group
Other Categories
Flint is a hard type of sedimentary rock that produces a small piece of burning material when hit by steel
From Old English flint - a type of rock mainly known for high hardness and for giving off sparks when struck
Fine Grained Rock, Opaque Rock
Greenschist is a metamorphic rock that is formed under lowest temperatures and pressures and is usually produced by regional metamorphism
From minerals such as chlorite, serpentine, and epidote, and platy minerals such as muscovite and platy serpentine which are green in color
Durable Rock, Medium Hardness Rock
Coarse Grained Rock, Fine Grained Rock, Medium Grained Rock, Opaque Rock