Obsidian and Blue Granite Definition

Definition of Obsidian and Blue Granite

The general Obsidian and Blue Granite 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, Blue Granite is an igneous rock and a variety of Larvikite, notable for the presence of thumbnail-sized blue crystals of feldspar. Along with definition of Obsidian and Blue Granite, get to know about Properties of Obsidian and Blue Granite. Get to know more information about Obsidian and Blue Granite origin and discoverer, etymology and class.

History of Obsidian and Blue Granite

The history of Obsidian and Blue Granite 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 Blue Granite Origin and Discoverer

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

Etymology of Obsidian and Blue Granite

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

For Obsidian,

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

For Blue Granite,

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