Definition
Jasperoid is a rare, peculiar type of metasomatic alteration of rocks
Anthracite is a type of sedimentary rock which is hard and is variety of coal that has high luster
History
Origin
USA
Pennsylvania, U.S.
Discoverer
Unknown
Unknown
Etymology
From silica, the main mineral content of Jasperoid
From Greek anthrakites, from anthrax, anthrak meaning coal
Class
Sedimentary Rocks
Metamorphic Rocks
Sub-Class
Durable Rock, Medium Hardness Rock
Durable Rock, Soft Rock
Family
Group
-
-
Other Categories
Coarse Grained Rock, Fine Grained Rock, Medium Grained Rock, Opaque Rock
Coarse Grained Rock, Fine Grained Rock, Medium Grained Rock, Opaque Rock