Definition
Anthracite is a type of sedimentary rock which is hard and is variety of coal that has high luster
Limestone is a sedimentary rock composed mostly of calcite and aragonite, which are different crystal forms of calcium carbonate
History
Origin
Pennsylvania, U.S.
New Zealand
Discoverer
Unknown
Belsazar Hacquet
Etymology
From Greek anthrakites, from anthrax, anthrak meaning coal
From lime and stone in late 14th Century
Class
Metamorphic Rocks
Sedimentary Rocks
Sub-Class
Durable Rock, Soft Rock
Durable Rock, Medium Hardness Rock
Family
Group
-
-
Other Categories
Coarse Grained Rock, Fine Grained Rock, Medium Grained Rock, Opaque Rock
Fine Grained Rock, Opaque Rock