Obsidian and Appinite Definition

Definition of Obsidian and Appinite

The general Obsidian and Appinite 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, Appinite is an igneous rock in which the crystals are so fine grained that individual minerals cannot be easily distinguished. Along with definition of Obsidian and Appinite, get to know about Properties of Obsidian and Appinite. Get to know more information about Obsidian and Appinite origin and discoverer, etymology and class.

History of Obsidian and Appinite

The history of Obsidian and Appinite 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 Appinite Origin and Discoverer

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

Etymology of Obsidian and Appinite

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

For Obsidian,

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

For Appinite,

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