Diabase

Comendite

Diabase and Comendite

Diabase

Comendite

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1 Definition

1.1 Definition

Diabase is a fine-grained igneous rock which is composed mostly of pyroxene and feldspar

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

1.2 History

1.2.1 Origin

Germany

Italy

1.2.2 Discoverer

Christian Leopold von Buch

Unknown

1.3 Etymology

From Greek di + base

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, Medium Grained Rock, Opaque Rock

Medium Grained Rock, Opaque Rock

2 Texture

2.1 Texture

Aphanitic, Granular

Porphyritic

2.2 Color

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

Vesicular

Foliated

3 Uses

3.1 Architecture

3.1.1 Interior Uses

Countertops, Decorative Aggregates, Homes, Interior Decoration, Kitchens

Countertops, Decorative Aggregates, Interior Decoration

3.1.2 Exterior Uses

As Building Stone, As Facing Stone, Paving Stone, Garden Decoration, Office Buildings

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, Building houses or walls, Cement Manufacture, 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

An Oil and Gas Reservoir, Cemetery Markers, Commemorative Tablets, Laboratory bench tops, Jewelry, Sea Defence, Tombstones

Cemetery Markers

4 Types

4.1 Types

Not Available

Rhyolite

4.2 Features

Smooth to touch

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

Stonehenge in English county of Wiltshire

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

Diabase forms when molten igneous rock is squeezed up into a vertical crack in other rocks, the crack is usually forced apart and the molten rock cools in the space to form a tabular igneous intrusion cutting across the surrounding rocks and is known as a dike.

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

Augite, Chlorite, Olivine, Plagioclase, Pyroxene, Pyrrhotite, Serpentine

Albite, Amphibole, Quartz

5.2.2 Compound Content

Aluminium Oxide, CaO, Chromium(III) Oxide, Iron(III) Oxide, Potassium Oxide, MgO, Sodium Oxide, Silicon Dioxide, Sulfur Trioxide

Al, Fe, Potassium Oxide

5.3 Transformation

5.3.1 Metamorphism

✔ ✘

5.3.2 Types of Metamorphism

Burial Metamorphism, Cataclastic Metamorphism, Contact Metamorphism, Regional Metamorphism

Cataclastic Metamorphism, Regional Metamorphism

5.3.3 Weathering

✔ ✘

5.3.4 Types of Weathering

Biological Weathering, Chemical Weathering

Biological Weathering, Chemical Weathering, Mechanical Weathering

5.3.5 Erosion

✔ ✘

5.3.6 Types of Erosion

Chemical Erosion, Coastal Erosion, Water Erosion

Coastal Erosion, Water Erosion

6 Properties

6.1 Physical Properties

6.1.1 Hardness

76-7

1 7

6.1.2 Grain Size

Fine to Medium Grained

Medium Grained

6.1.3 Fracture

Conchoidal

Pervasive

6.1.4 Streak

Black

Bluish Black

6.1.5 Porosity

Highly Porous

6.1.6 Luster

Not Available

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

1.6

6.1.10 Specific Gravity

2.86-2.872.38

0 8.4

1.4.1 Transparency

Opaque

1.4.3 Density

2.7-3.3 g/cm³Not Available

0 1400

1.6 Thermal Properties

1.6.1 Specific Heat Capacity

NANA

0.14 3.2

1.6.2 Resistance

Heat Resistant, Impact Resistant, Pressure Resistant, Wear Resistant

Heat Resistant, Impact Resistant

2 Reserves

2.1 Deposits in Eastern Continents

2.1.1 Asia

India

China

2.1.2 Africa

South Africa, Tanzania

East Africa

2.1.3 Europe

Germany, Greece, Italy, Scotland, Turkey

Italy

2.1.4 Others

Antarctica, Greenland

Not Yet Found

2.2 Deposits in Western Continents

2.2.1 North America

Canada, USA

Not Yet Found

2.2.2 South America

Argentina, Brazil, Colombia, Venezuela

Not Yet Found

2.3 Deposits in Oceania Continent

2.3.1 Australia

Central Australia, New Zealand, Queensland, Western Australia

Queensland

All about Diabase and Comendite Properties

Know all about Diabase and Comendite properties here. All properties of rocks are important as they define the type of rock and its application. Diabase and Comendite belong to Igneous Rocks.Texture of Diabase is Aphanitic, Granular whereas that of Comendite is Porphyritic. Diabase appears Vesicular and Comendite appears Foliated. The luster of Diabase is not available while that of Comendite is dull. Diabase is available in dark grey to black colors whereas Comendite is available in blue, bluish - grey colors. The commercial uses of Diabase and Comendite are an oil and gas reservoir, cemetery markers, commemorative tablets, laboratory bench tops, jewelry, sea defence, tombstones.