Andesite

Comendite

Andesite and Comendite

Andesite

Comendite

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1 Definition

1.1 Definition

Andesite is a dark, fine-grained, brown or greyish intermediate volcanic rock which is a commonly found in lava

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

1.2 History

1.2.1 Origin

North America

Italy

1.2.2 Discoverer

Unknown

1.3 Etymology

From Andes mountains, where it is found in abundance

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

1.4 Class

Igneous Rocks

1.4.1 Sub-Class

Durable Rock, Hard Rock

1.5 Family

1.5.1 Group

Volcanic

1.6 Other Categories

Fine Grained Rock, Opaque Rock

Medium Grained Rock, Opaque Rock

2 Texture

2.1 Texture

Aphanitic to Porphyritic

Porphyritic

2.2 Color

Bluish - Grey, Grey, Pink, Yellow

Blue, Bluish - Grey

2.3 Maintenance

Less

2.4 Durability

Durable

2.4.1 Water Resistant

✔ ✘

2.4.2 Scratch Resistant

✔ ✘

2.4.3 Stain Resistant

✔ ✘

2.4.4 Wind Resistant

✔ ✘

2.4.5 Acid Resistant

✔ ✘

2.5 Appearance

Dull and Soft

Foliated

3 Uses

3.1 Architecture

3.1.1 Interior Uses

Decorative Aggregates, Floor Tiles, Homes, Interior Decoration, Kitchens

Countertops, Decorative Aggregates, Interior Decoration

3.1.2 Exterior Uses

Office Buildings, Roof Tiles

As Building Stone, As Facing Stone, Garden Decoration

3.1.3 Other Architectural Uses

Curbing

3.2 Industry

3.2.1 Construction Industry

Cobblestones, Construction Aggregate, for Road Aggregate

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

3.2.2 Medical Industry

Not Yet Used

3.3 Antiquity Uses

Artifacts, Monuments, Sculpture, Small Figurines

Artifacts

3.4 Other Uses

3.4.1 Commercial Uses

Commemorative Tablets, Creating Artwork

Cemetery Markers

4 Types

4.1 Types

Icelandite

Rhyolite

4.2 Features

Generally rough to touch, High silica content, Is one of the oldest rock

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

4.3 Archaeological Significance

4.3.1 Monuments

Used

Not Yet Used

4.3.2 Famous Monuments

Middle of the Earth in Ecuador

Not Applicable

4.3.3 Sculpture

Used

Not Yet Used

4.3.4 Famous Sculptures

Data Not Available

Not Applicable

4.3.5 Pictographs

Not Used

4.3.6 Petroglyphs

Not Used

4.3.7 Figurines

Used

Not Yet Used

4.4 Fossils

Absent

5 Formation

5.1 Formation

Andesite is a fine-grained igneous rock that forms when the magma is erupted onto the surface and is crystallized quickly.

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.

5.2 Composition

5.2.1 Mineral Content

Amphibole, Apatite, Biotite, Feldspar, Garnet, Hornblade, Ilmenite, Magnetite, Plagioclase, Pyroxene, Zircon

Albite, Amphibole, Quartz

5.2.2 Compound Content

Silicon Dioxide

Al, Fe, Potassium Oxide

5.3 Transformation

5.3.1 Metamorphism

✔ ✘

5.3.2 Types of Metamorphism

Burial Metamorphism, Cataclastic Metamorphism, Contact Metamorphism, Hydrothermal Metamorphism, Impact Metamorphism, Regional Metamorphism

Cataclastic Metamorphism, Regional Metamorphism

5.3.3 Weathering

✔ ✘

5.3.4 Types of Weathering

Biological Weathering, Chemical Weathering, Mechanical Weathering

5.3.5 Erosion

✔ ✘

5.3.6 Types of Erosion

Chemical Erosion, Coastal Erosion, Glacier Erosion

Coastal Erosion, Water Erosion

6 Properties

6.1 Physical Properties

6.1.1 Hardness

76-7

1 7

6.1.2 Grain Size

Very fine-grained

Medium Grained

6.1.3 Fracture

Uneven

Pervasive

6.1.4 Streak

White

Bluish Black

6.1.5 Porosity

Less Porous

Highly Porous

6.1.6 Luster

Vitreous

Dull

6.1.7 Compressive Strength

225.00 N/mm²92.40 N/mm²

0.15 450

6.1.8 Cleavage

Not Available

6.1.9 Toughness

1.1

6.1.10 Specific Gravity

2.5-2.82.38

0 8.4

6.1.11 Transparency

Opaque

6.1.12 Density

2.11-2.36 g/cm³Not Available

0 1400

6.2 Thermal Properties

6.2.1 Specific Heat Capacity

2.39 kJ/Kg KNA

0.14 3.2

6.2.2 Resistance

Heat Resistant, Pressure Resistant, Wear Resistant

Heat Resistant, Impact Resistant

7 Reserves

7.1 Deposits in Eastern Continents

7.1.1 Asia

India, Indonesia, Japan, Nepal, South Korea

China

7.1.2 Africa

Egypt, Ethiopia, Morocco, Namibia, South Africa, Tanzania

East Africa

7.1.3 Europe

Austria, Finland, Germany, Italy, Romania, Turkey, United Kingdom

Italy

7.1.4 Others

Not Yet Found

7.2 Deposits in Western Continents

7.2.1 North America

Mexico, USA

Not Yet Found

7.2.2 South America

Argentina, Bolivia, Chile, Colombia, Ecuador, Peru, Venezuela

Not Yet Found

7.3 Deposits in Oceania Continent

7.3.1 Australia

New South Wales, New Zealand, Western Australia

Queensland

All about Andesite and Comendite Properties

Know all about Andesite and Comendite properties here. All properties of rocks are important as they define the type of rock and its application. Andesite and Comendite belong to Igneous Rocks.Texture of Andesite is Aphanitic to Porphyritic whereas that of Comendite is Porphyritic. Andesite appears Dull and Soft and Comendite appears Foliated. The luster of Andesite is vitreous while that of Comendite is dull. Andesite is available in bluish - grey, grey, pink, yellow colors whereas Comendite is available in blue, bluish - grey colors. The commercial uses of Andesite are commemorative tablets, creating artwork and that of Comendite are cemetery markers.