Obsidian and Borolanite Definition

Definition of Obsidian and Borolanite

The general Obsidian and Borolanite definition can be stated as: 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. On the other hand, Borolanite is a variety of Nepheline Syenite and belongs to igneous rocks and contains nepheline-alkali feldspar pseudomorphs which occur as conspicuous white spots in the dark rock matrix. Along with definition of Obsidian and Borolanite, get to know about Properties of Obsidian and Borolanite. Get to know more information about Obsidian and Borolanite origin and discoverer, etymology and class.

History of Obsidian and Borolanite

The history of Obsidian and Borolanite 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.

Obsidian and Borolanite Origin and Discoverer

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

Etymology of Obsidian and Borolanite

Along with Obsidian and Borolanite definition, know more about the etymology of Obsidian and Borolanite. Etymology of Obsidian and Borolanite gives information about origin and formation of a particular rock. Know more about Formation of Obsidian and Formation of Borolanite. The etymology of Obsidian is From Latin obsidianus, misprint of Obsianus (lapis) (stone) of Obsius while that of Borolanite is From Latin obsidianus, misprint of Obsianus (lapis) (stone) of Obsius. The process of formation of rocks defines the class of rock. All the rocks in a class are formed by similar processes. Obsidian and Borolanite belong to Igneous Rocks. The sub-class, group and other categories of Obsidian and Borolanite are listed below.

For Obsidian,

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

For Borolanite,

• Sub-class: Durable Rock and Medium Hardness Rock
• Group: Plutonic
• Other Categories: Fine grained rock and Opaque rock