Comendite

Carbonatite

Comendite and Carbonatite

Comendite

Carbonatite

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Definition

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

Carbonatite is intrusive or extrusive igneous rock which is defined by mineralogic composition, consisting of greater than 50 percent carbonate minerals

History

Origin

Italy

Tanzania

Discoverer

Unknown

Etymology

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

From any intrusive igneous rock, having a majority of carbonate minerals

Class

Igneous Rocks

Sub-Class

Durable Rock, Hard Rock

Durable Rock, Soft Rock

Family

Group

Volcanic

Plutonic

Other Categories

Medium Grained Rock, Opaque Rock

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

Texture

Porphyritic

Granular, Poikiloblastic

Color

Blue, Bluish - Grey

Black, Brown, Green, Grey, Pink, White

Maintenance

Less

Durability

Durable

Water Resistant

✔ ✘

Scratch Resistant

✔ ✘

Stain Resistant

✔ ✘

Wind Resistant

✔ ✘

Acid Resistant

✔ ✘

Appearance

Foliated

Dull, Banded and Foilated

Uses

Architecture

Interior Uses

Countertops, Decorative Aggregates, Interior Decoration

Decorative Aggregates, Interior Decoration

Exterior Uses

As Building Stone, As Facing Stone, Garden Decoration

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

As a Flux in the Production of Steel and Pig Iron, As a Sintering Agent in Steel Industry to process Iron Ore, As Dimension Stone, Cement Manufacture, for Road Aggregate, Making natural cement, Manufacture of Magnesium and Dolomite Refractories

Medical Industry

Taken as a Supplement for Calcium or Magnesium

Antiquity Uses

Artifacts

Other Uses

Commercial Uses

Cemetery Markers

An Oil and Gas Reservoir, As a Feed Additive for Livestock, Gemstone, Metallurgical Flux

Types

Rhyolite

Carbonatite

Features

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

Available in lots of colors, Generally rough to touch, Is one of the oldest rock

Archaeological Significance

Monuments

Famous Monuments

Sculpture

Famous Sculptures

Pictographs

Petroglyphs

Figurines

Fossils

Absent

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.

Carbonatites are intrusive or extrusive igneous rocks which are defined by mineralogic composition consisting of greater than 50 percent carbonate minerals and are formed due to low degrees of partial melting of rocks.

Composition

Mineral Content

Albite, Amphibole, Quartz

Ancylite, Apatite, Barite, Fluorite, Magnetite, Natrolite, Sodalite

Compound Content

Al, Fe, Potassium Oxide

CaO, Carbon Dioxide, Sodium Oxide

Transformation

Metamorphism

✔ ✘

Types of Metamorphism

Cataclastic Metamorphism, Regional Metamorphism

Burial Metamorphism, Contact Metamorphism

Weathering

✔ ✘

Types of Weathering

Biological Weathering, Chemical Weathering, Mechanical Weathering

Erosion

✔ ✘

Types of Erosion

Coastal Erosion, Water Erosion

Chemical Erosion, Wind Erosion

Properties

Physical Properties

Hardness

6-73

1 7

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Grain Size

Medium Grained

Medium to Fine Coarse Grained

Fracture

Pervasive

Conchoidal

Streak

Bluish Black

White

Porosity

Highly Porous

Less Porous

Luster

Dull

Subvitreous to Dull

Compressive Strength

92.40 N/mm²75.00 N/mm²

0.15 450

👆🏻

Cleavage

Toughness

Specific Gravity

2.382.86-2.87

0 8.4

👆🏻

Transparency

Opaque

Density

-9999 g/cm³2.84-2.86 g/cm³

0 1400

👆🏻

Thermal Properties

Specific Heat Capacity

0.79 kJ/Kg K0.51 kJ/Kg K

0.14 3.2

👆🏻

Resistance

Heat Resistant, Impact Resistant

Heat Resistant, Pressure Resistant, Water Resistant

Reserves

Deposits in Eastern Continents

Asia

China

China, India, Kazakhstan, Mongolia, Russia, Uzbekistan

Africa

East Africa

Namibia, Nigeria, South Africa

Europe

Italy

Austria, Denmark, Germany, Great Britain, Netherlands, Norway, Poland, Sweden, Switzerland, United Kingdom

Others

Greenland

Deposits in Western Continents

North America

Canada, USA

South America

Brazil

Deposits in Oceania Continent

Australia

Queensland

New South Wales, New Zealand

All about Comendite and Carbonatite Properties

Know all about Comendite and Carbonatite properties here. All properties of rocks are important as they define the type of rock and its application. Comendite and Carbonatite belong to Igneous Rocks.Texture of Comendite is Porphyritic whereas that of Carbonatite is Granular, Poikiloblastic. Comendite appears Foliated and Carbonatite appears Dull, Banded and Foilated. The luster of Comendite is dull while that of Carbonatite is subvitreous to dull. Comendite is available in blue, bluish - grey colors whereas Carbonatite is available in black, brown, green, grey, pink, white colors. The commercial uses of Comendite are cemetery markers and that of Carbonatite are an oil and gas reservoir, as a feed additive for livestock, gemstone, metallurgical flux.