Obsidian and Tephrite Definition

Definition of Obsidian and Tephrite

The general Obsidian and Tephrite 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, Tephrite is an aphanitic to porphyritic textured, volcanic igneous rock. Along with definition of Obsidian and Tephrite, get to know about Properties of Obsidian and Tephrite. Get to know more information about Obsidian and Tephrite origin and discoverer, etymology and class.

History of Obsidian and Tephrite

The history of Obsidian and Tephrite 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 Tephrite Origin and Discoverer

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

Etymology of Obsidian and Tephrite

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

For Obsidian,

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

For Tephrite,

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