Migmatite

Comendite

Migmatite and Comendite

Migmatite

Comendite

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1 Definition

1.1 Definition

Migmatite is typically a granitic rock within a metamorphic host rock which is composed of two intermingled but distinguishable components

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

1.2 History

1.2.1 Origin

Southern Alps, France

Italy

1.2.2 Discoverer

Jakob Sederholm

Unknown

1.3 Etymology

From the Greek word migma which means a mixture

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

1.4 Class

Metamorphic Rocks

Igneous Rocks

1.4.1 Sub-Class

Durable Rock, Medium Hardness Rock

Durable Rock, Hard Rock

1.5 Family

1.5.1 Group

Not Applicable

Volcanic

1.6 Other Categories

Coarse Grained Rock, Fine Grained Rock, Medium Grained Rock, Opaque Rock

Medium Grained Rock, Opaque Rock

2 Texture

2.1 Texture

Foliated

Porphyritic

2.2 Color

Black, Bluish - Grey, Brown, Brown- Black, Dark Greenish - Grey, Dark Grey to Black

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, Banded and Foilated

Foliated

3 Uses

3.1 Architecture

3.1.1 Interior Uses

Countertops, Flooring, Kitchens

Countertops, Decorative Aggregates, Interior Decoration

3.1.2 Exterior Uses

As Building Stone, As Facing Stone

As Building Stone, As Facing Stone, Garden Decoration

3.1.3 Other Architectural Uses

Curbing

3.2 Industry

3.2.1 Construction Industry

As Dimension Stone, Cement Manufacture, for Road Aggregate, Making natural cement

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

3.4 Other Uses

3.4.1 Commercial Uses

Cemetery Markers, Jewelry, Tombstones, Used to manufracture paperweights and bookends

Cemetery Markers

4 Types

4.1 Types

Diatexites and Metatexites

Rhyolite

4.2 Features

Generally rough to touch, 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

Not Yet Used

4.3.2 Famous Monuments

Not Applicable

4.3.3 Sculpture

Not Yet Used

4.3.4 Famous Sculptures

Not Applicable

4.3.5 Pictographs

Used

Not Used

4.3.6 Petroglyphs

Used

Not Used

4.3.7 Figurines

Not Yet Used

4.4 Fossils

Absent

5 Formation

5.1 Formation

Migmatites form by high temperature regional and thermal metamorphism of protolith rocks where rocks melt partially due to high temperature.

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

Biotite, Chlorite, Feldspar, Garnet, Graphite, Hornblade, Micas, Muscovite or Illite, Quartz, Quartzite, Silica, Zircon

Albite, Amphibole, Quartz

5.2.2 Compound Content

Aluminium Oxide, NaCl, CaO, Carbon Dioxide, Iron(III) Oxide, FeO, Potassium Oxide, Magnesium Carbonate, MgO, MnO, Phosphorus Pentoxide, Silicon Dioxide, Titanium Dioxide

Al, Fe, Potassium Oxide

5.3 Transformation

5.3.1 Metamorphism

✔ ✘

5.3.2 Types of Metamorphism

Burial Metamorphism, Cataclastic 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, Glacier Erosion, Water Erosion, Wind Erosion

Coastal Erosion, Water Erosion

6 Properties

6.1 Physical Properties

6.1.1 Hardness

5.5-6.56-7

1 7

6.1.2 Grain Size

Medium to Fine Coarse Grained

Medium Grained

6.1.3 Fracture

Irregular

Pervasive

6.1.4 Streak

White

Bluish Black

6.1.5 Porosity

Very Less Porous

Highly Porous

6.1.6 Luster

Dull to Pearly to Subvitreous

Dull

6.1.7 Compressive Strength

NA92.40 N/mm²

0.15 450

6.1.8 Cleavage

Poor

Not Available

6.1.9 Toughness

1.2

6.1.10 Specific Gravity

2.65-2.752.38

0 8.4

6.1.11 Transparency

Opaque

6.1.12 Density

Not AvailableNot Available

0 1400

6.2 Thermal Properties

6.2.1 Specific Heat Capacity

NANA

0.14 3.2

6.2.2 Resistance

Heat Resistant, Pressure Resistant

Heat Resistant, Impact Resistant

7 Reserves

7.1 Deposits in Eastern Continents

7.1.1 Asia

China, India, Iran, Iraq, Kazakhstan, Kyrgyzstan, Mongolia, Russia

China

7.1.2 Africa

Cameroon, Ethiopia, Ghana, Kenya, Madagascar, Morocco, Mozambique, Namibia, Nigeria, Tanzania, Togo

East Africa

7.1.3 Europe

Albania, Austria, Bosnia and Herzegovina, Finland, France, Georgia, Germany, Hungary, Italy, Kosovo, Monaco, Norway, Poland, Romania, Serbia, Slovakia, Slovenia, Sweden, Switzerland, Ukraine, United Kingdom

Italy

7.1.4 Others

Not Yet Found

7.2 Deposits in Western Continents

7.2.1 North America

Canada, Costa Rica, Cuba, Mexico, Panama, USA

Not Yet Found

7.2.2 South America

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

Not Yet Found

7.3 Deposits in Oceania Continent

7.3.1 Australia

New South Wales, New Zealand, Queensland, Victoria

Queensland

All about Migmatite and Comendite Properties

Know all about Migmatite and Comendite properties here. All properties of rocks are important as they define the type of rock and its application. Migmatite belongs to Metamorphic Rocks while Comendite belongs to Igneous Rocks.Texture of Migmatite is Foliated whereas that of Comendite is Porphyritic. Migmatite appears Dull, Banded and Foilated and Comendite appears Foliated. The luster of Migmatite is dull to pearly to subvitreous while that of Comendite is dull. Migmatite is available in black, bluish - grey, brown, brown- black, dark greenish - grey, dark grey to black colors whereas Comendite is available in blue, bluish - grey colors. The commercial uses of Migmatite and Comendite are cemetery markers, jewelry, tombstones, used to manufracture paperweights and bookends.