Anthracite

Rhyolite

Anthracite and Rhyolite

Anthracite

Rhyolite

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1 Definition

1.1 Definition

Anthracite is a type of sedimentary rock which is hard and is variety of coal that has high luster

Rhyolite is a fine-grained igneous rock which is rich in silica

1.2 History

1.2.1 Origin

Pennsylvania, U.S.

North America

1.2.2 Discoverer

Unknown

Ferdinand von Richthofen

1.3 Etymology

From Greek anthrakites, from anthrax, anthrak meaning coal

From German Rhyolit, from Greek rhuax lava stream + lithos stone

1.4 Class

Metamorphic Rocks

Igneous Rocks

1.4.1 Sub-Class

Durable Rock, Soft 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

Coarse Grained Rock, Opaque Rock

3 Texture

3.1 Texture

Amorphous, Glassy

Aphanitic, Glassy, Porphyritic

3.2 Color

Black, Brown, Dark Brown, Grey, Light to Dark Grey

Grey, White, Light Black

3.3 Maintenance

Less

3.4 Durability

Durable

3.5.1 Water Resistant

✔ ✘

81% Metamorphic Rocks Rocks have it !

✔ ✘

81% Igneous Rocks Rocks have it !

3.6.2 Scratch Resistant

✔ ✘

65% Metamorphic Rocks Rocks have it !

✔ ✘

86% Igneous Rocks Rocks have it !

3.6.3 Stain Resistant

✔ ✘

42% Metamorphic Rocks Rocks have it !

✔ ✘

66% Igneous Rocks Rocks have it !

3.6.4 Wind Resistant

✔ ✘

19% Metamorphic Rocks Rocks have it !

✔ ✘

49% Igneous Rocks Rocks have it !

3.6.5 Acid Resistant

✔ ✘

15% Metamorphic Rocks Rocks have it !

✔ ✘

48% Igneous Rocks Rocks have it !

3.7 Appearance

Veined or Pebbled

Banded

4 Uses

4.1 Architecture

4.1.1 Interior Uses

Not Yet Used

Decorative Aggregates, Homes, Hotels, Interior Decoration, Kitchens

4.1.2 Exterior Uses

Not Yet Used

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

4.1.3 Other Architectural Uses

Not Yet Used

4.2 Industry

4.2.1 Construction Industry

Cement Manufacture, for Road Aggregate, Making natural cement, Steel Production

Arrowheads, As Dimension Stone, Building houses or walls, Construction Aggregate, Cutting Tool, for Road Aggregate, Knives

4.2.2 Medical Industry

In Chemical and Pharmaceutical Industry, Manufacture of Aspirins

Not Yet Used

4.3 Antiquity Uses

Not Yet Used

Artifacts

4.4 Other Uses

4.4.1 Commercial Uses

Alumina Refineries, Electricity Generation, Liquid Fuel, Manufacture of Soap, Solvents, Dyes, Plastics and Fibres, Paper Industry

Gemstone, Laboratory bench tops, Jewelry

5 Types

5.1 Types

Semi-anthracite and Meta-anthracite

Pumice Rocks, Obsidian Rocks, Perlite Rocks, Porphyritic Rocks.

5.2 Features

Helps in production of Heat and Electricity, Used as fossil fuel

Acidic in nature, Available in lots of colors

5.3 Archaeological Significance

5.3.1 Monuments

Not Yet Used

5.3.2 Famous Monuments

Not Applicable

5.3.3 Sculpture

Not Yet Used

5.3.4 Famous Sculptures

Not Applicable

5.3.5 Pictographs

Used

Not Used

5.3.6 Petroglyphs

Used

Not Used

5.3.7 Figurines

Not Yet Used

5.4 Fossils

Absent

6 Formation

6.1 Formation

Anthracite forms from the accumulation of plant debris in a swamp environment. When plant debris dies and falls into the swamp, the standing water of the swamp protects it from decay.

Rhyolite is a felsic extrusive rock and due to its high silica content, rhyolite lava is very viscous and is volcanic equivalent of granite.

6.2 Composition

6.2.1 Mineral Content

Calcite, Clay, Clay Minerals

Biotite, Feldspar, Hornblade, Plagioclase, Pyroxene, Quartz

6.2.2 Compound Content

Carbon, Hydrogen, Nitrogen, Oxygen, Sulphur

Ca, Fe, Potassium Oxide, Mg, Potassium, Silicon Dioxide, Sodium

6.3 Transformation

6.3.1 Metamorphism

✔ ✘

50% Metamorphic Rocks Rocks have it !

✔ ✘

97% Igneous Rocks Rocks have it !

6.3.2 Types of Metamorphism

Burial Metamorphism, Contact Metamorphism, Regional Metamorphism

Burial Metamorphism, Cataclastic Metamorphism, Regional Metamorphism

6.3.3 Weathering

✔ ✘

65% Metamorphic Rocks Rocks have it !

✔ ✘

99% Igneous Rocks Rocks have it !

6.3.4 Types of Weathering

Not Applicable

Biological Weathering, Chemical Weathering, Mechanical Weathering

6.3.5 Erosion

✔ ✘

77% Metamorphic Rocks Rocks have it !

✔ ✘

92% Igneous Rocks Rocks have it !

6.3.6 Types of Erosion

Not Applicable

Chemical Erosion, Sea Erosion, Water Erosion, Wind Erosion

7 Properties

7.1 Physical Properties

7.1.1 Hardness

1-1.5

6-7

7.1.2 Grain Size

Medium to Fine Coarse Grained

Large and Coarse Grained

7.1.3 Fracture

Conchoidal

Sub-conchoidal

7.1.4 Streak

Black

Colorless

7.1.5 Porosity

Less Porous

Highly Porous

7.1.6 Luster

Shiny

Earthy

7.1.7 Compressive Strength

What Is Flint

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▶

▼

Not Available

Rank: N/A (Overall)▶

140.00 N/mm²

Rank: 15 (Overall)▶

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What Is Obsidian

⊕

▶

175 (What Is Grani..)

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7.1.8 Cleavage

Non-Existent

Not Available

7.1.9 Toughness

Not Available

7.1.10 Specific Gravity

1.1-1.4

2.65-2.67

7.1.11 Transparency

Opaque

7.1.12 Density

1.25-2.5 g/cm³

2.4-2.6 g/cm³

7.2 Thermal Properties

7.2.1 Specific Heat Capacity

What Is Banded ..

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▶

▼

1.32 kJ/Kg K

Rank: 4 (Overall)▶

Not Available

Rank: N/A (Overall)▶

▲

What Is Granulite

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▶

1.09 (What Is Trave..)

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7.2.2 Resistance

Heat Resistant, Water Resistant

Heat Resistant, Wear Resistant

8 Reserves

8.1 Deposits in Eastern Continents

8.1.1 Asia

Bangladesh, Burma, Cambodia, China, India, Indonesia, Kazakhstan, Malaysia, Mongolia, Pakistan, Turkey, Vietnam

China, India

8.1.2 Africa

Botswana, Kenya, Morocco, Mozambique, South Africa, Tanzania

Angola, Egypt, Madagascar, Namibia, Nigeria, South Africa

8.1.3 Europe

Belgium, Bulgaria, England, France, Germany, Greece, Hungary, Kosovo, Netherlands, Norway, Poland, Romania, Serbia, Slovakia, Slovenia, The Czech Republic, Ukraine, United Kingdom

Germany, Iceland, Ireland, Italy, Spain

8.1.4 Others

Not Yet Found

8.2 Deposits in Western Continents

8.2.1 North America

Canada, Mexico, USA

Canada, USA

8.2.2 South America

Brazil, Chile, Colombia, Venezuela

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

8.3 Deposits in Oceania Continent

8.3.1 Australia

New South Wales, Queensland, Victoria

New Zealand, Queensland, Western Australia

All about Anthracite and Rhyolite Properties

Know all about Anthracite and Rhyolite properties here. All properties of rocks are important as they define the type of rock and its application. Anthracite belongs to Metamorphic Rocks while Rhyolite belongs to Igneous Rocks.Texture of Anthracite is Amorphous, Glassy whereas that of Rhyolite is Aphanitic, Glassy, Porphyritic. Anthracite appears Veined or Pebbled and Rhyolite appears Banded. The luster of Anthracite is shiny while that of Rhyolite is earthy. Anthracite is available in black, brown, dark brown, grey, light to dark grey colors whereas Rhyolite is available in grey, white, light black colors. The commercial uses of Anthracite are alumina refineries, electricity generation, liquid fuel, manufacture of soap, solvents, dyes, plastics and fibres, paper industry and that of Rhyolite are gemstone, laboratory bench tops, jewelry.