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What is Comendite?



Definition

Definition
Comendite is a hard, peralkaline igneous rock, a type of light blue grey rhyolite

History

Origin
Italy

Discoverer
Unknown

Etymology
Comendite derives its name from the area of Le Commende on San Pietro Island in Italy

Class
Igneous Rocks

Sub-Class
Durable Rock, Hard Rock

Family

Group
Volcanic

Other Categories
Medium Grained Rock, Opaque Rock

Texture

Texture
Porphyritic

Color
Blue, Bluish - Grey

Maintenance
Less

Durability
Durable

Water Resistant
Yes

Scratch Resistant
Yes

Stain Resistant
Yes

Wind Resistant
Yes

Acid Resistant
Yes

Appearance
Foliated

Uses

Architecture

Interior Uses
Countertops, Decorative Aggregates, Interior Decoration

Exterior Uses
As Building Stone, As Facing Stone, Garden Decoration

Other Architectural Uses
Curbing

Industry

Construction Industry
Building houses or walls, Cement Manufacture, Construction Aggregate, for Road Aggregate, Landscaping, Making natural cement, Raw material for the manufacture of mortar

Medical Industry
-

Antiquity Uses
Artifacts

Other Uses

Commercial Uses
Cemetery Markers

Types

Types
Rhyolite

Features
Very fine grained rock, It is One of the Oldest, Strongest and Hardest Rock

Archaeological Significance

Monuments
-

Famous Monuments
-

Sculpture
-

Famous Sculptures
-

Pictographs
-

Petroglyphs
-

Figurines
-

Fossils
Absent

Formation

Formation
Comendite is a type of Igneous rock which is formed due to cooling and solidification of lava or magma. It may form with or without crystallization, either below the surface as intrusive rocks or on the surface as extrusive rocks.

Composition

Mineral Content
Albite, Amphibole, Quartz

Compound Content
Al, Fe, Potassium Oxide

Transformation

Metamorphism
Yes

Types of Metamorphism
Cataclastic Metamorphism, Regional Metamorphism

Weathering
Yes

Types of Weathering
Biological Weathering, Chemical Weathering, Mechanical Weathering

Erosion
Yes

Types of Erosion
Coastal Erosion, Water Erosion

Properties

Physical Properties

Hardness
6-7

Grain Size
Medium Grained

Fracture
Pervasive

Streak
Bluish Black

Porosity
Highly Porous

Luster
Dull

Compressive Strength
92.40 N/mm2 31

Cleavage
-

Toughness
2

Specific Gravity
2.38

Transparency
Opaque

Density
-9999 g/cm3

Thermal Properties

Specific Heat Capacity
0.79 kJ/Kg K 17

Resistance
Heat Resistant, Impact Resistant

Reserves

Deposits in Eastern Continents

Asia
China

Africa
East Africa

Europe
Italy

Others
-

Deposits in Western Continents

North America
-

South America
-

Deposits in Oceania Continent

Australia
Queensland

Summary >>
<< Reserves

Igneous Rocks

Learn more about Properties of Comendite

What is Comendite? In this section, we will learn more about properties of Comendite i.e. physical and thermal properties. Physical properties of Comendite include Color, Streak, Hardness, Structure, Cleavage, Fracture, Luster, Specific Gravity etc. The strength of Comendite is 92.40 N/mm2. Streak of Comendite is bluish black while its cleavage is . Luster of Comendite is dull and its fracture is pervasive. Comendite is opaque in nature. Know all about Comendite, What is Comendite, its composition, features, facts and reserves in next sections.

Know about Composition of Comendite

What is Comendite composed of? Get to know about composition of Comendite here. Comendite definition gives information about the Formation of Comendite and its composition.The composition of Comendite can be further divided into mineral and compound content. The mineral content of Comendite rock includes Albite, Amphibole, Quartz and The compound content of Comendite rock includes Al, Fe, Potassium Oxide. Almost all rocks undergo transformation process. Know all about Comendite rock in next section.

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