Granite and Obsidian Definition

Definition of Granite and Obsidian

The general Granite and Obsidian definition can be stated as: Granite is a very hard, granular, crystalline igneous rock which consists mainly of quartz, mica, and feldspar and is often used as building stone. On the other hand, Obsidian is a naturally occurring volcanic glass formed as an extrusive igneous rock. It is produced when felsic lava extruded from a volcano cools rapidly with minimum crystal growth. Along with definition of Granite and Obsidian, get to know about Properties of Granite and Obsidian. Get to know more information about Granite and Obsidian origin and discoverer, etymology and class.

History of Granite and Obsidian

The history of Granite and Obsidian gives information about where the rock was found and who was its discoverer. Almost each and every aspect of Earth's history is recorded in rocks be it the volcanoes which were erupted or the plants, animals and organisms which are now extinct, as rocks are present from millions of years.

Granite and Obsidian Origin and Discoverer

Granite and Obsidian definition gives us a brief idea about the two rocks. In some cases, the definition also gives summary about the Formation of Granite and Obsidian. In this section, you will know about Granite and Obsidian Origin and Discoverer. Origin of Granite is whereas Origin of Obsidian is Ethiopia. It is interesting to know the name of Granite and Obsidian discoverer. The Discoverer of Granite is Alexander von Humboldt and the discoverer of Obsidian is Obsius.

Etymology of Granite and Obsidian

Along with Granite and Obsidian definition, know more about the etymology of Granite and Obsidian. Etymology of Granite and Obsidian gives information about origin and formation of a particular rock. Know more about Formation of Granite and Formation of Obsidian. The etymology of Granite is From Italian granito, which means grained rock, from grano grain, and from Latin granum while that of Obsidian is From Italian granito, which means grained rock, from grano grain, and from Latin granum. The process of formation of rocks defines the class of rock. All the rocks in a class are formed by similar processes. Granite and Obsidian belong to Igneous Rocks. The sub-class, group and other categories of Granite and Obsidian are listed below.

For Granite,

• Sub-class: Durable Rock and Hard Rock
• Group: Plutonic
• Other Categories: Coarse grained rock and Opaque rock

For Obsidian,

• Sub-class: Durable Rock and Medium Hardness Rock
• Group: Volcanic
• Other Categories: Opaque rock