Definition
Limestone is a sedimentary rock composed mostly of calcite and aragonite, which are different crystal forms of calcium carbonate
Gabbro is an intrusive igneous rock which is chemically equivalent to plutonic Basalt
History
Origin
New Zealand
Germany
Discoverer
Belsazar Hacquet
Christian Leopold von Buch
Etymology
From lime and stone in late 14th Century
From Latin glaber bare, smooth, bald
Class
Sedimentary Rocks
Igneous Rocks
Sub-Class
Durable Rock, Medium Hardness Rock
Durable Rock, Hard Rock
Family
Group
-
Plutonic
Other Categories
Fine Grained Rock, Opaque Rock
Coarse Grained Rock, Opaque Rock