Soapstone

Hornfels

Soapstone and Hornfels

Soapstone

Hornfels

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1 Definition

1.1 Definition

It is a metamorphic magnesium rich rock because it is composed of the mineral talc

Hornfels is a metamorphic rock formed by the contact between mudstone or other clay rich rock, and a hot igneous body, and represents a heat altered equivalent of the original rock

1.2 History

1.2.1 Origin

USA

New Zealand

1.2.2 Discoverer

Unknown

1.3 Etymology

From 17th century, because of its greasy feel and use like a soap

From German which means hornstone

1.4 Class

Metamorphic Rocks

1.4.1 Sub-Class

Durable Rock, Soft Rock

1.5 Family

1.5.1 Group

Not Applicable

1.6 Other Categories

Fine Grained Rock, Opaque Rock

2 Texture

2.1 Texture

Polished

Granular, Platy

2.2 Color

Black, Black to Grey, Green, Grey

Brown, Dark Greenish - Grey, Green, Reddish Brown

2.3 Maintenance

Less

2.4 Durability

Durable

2.4.1 Water Resistant

✔ ✘

81% Metamorphic Rocks Rocks have it !

✔ ✘

81% Metamorphic Rocks Rocks have it !

2.4.2 Scratch Resistant

✔ ✘

65% Metamorphic Rocks Rocks have it !

✔ ✘

65% Metamorphic Rocks Rocks have it !

2.4.3 Stain Resistant

✔ ✘

42% Metamorphic Rocks Rocks have it !

✔ ✘

42% Metamorphic Rocks Rocks have it !

2.4.4 Wind Resistant

✔ ✘

19% Metamorphic Rocks Rocks have it !

✔ ✘

19% Metamorphic Rocks Rocks have it !

2.4.5 Acid Resistant

✔ ✘

15% Metamorphic Rocks Rocks have it !

✔ ✘

15% Metamorphic Rocks Rocks have it !

2.5 Appearance

Dull, Banded and Foilated

Dull

3 Uses

3.1 Architecture

3.1.1 Interior Uses

Bathrooms, Decorative Aggregates, Homes, Interior Decoration

Decorative Aggregates, Flooring, Homes, Interior Decoration

3.1.2 Exterior Uses

As Facing Stone, Garden Decoration

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

3.1.3 Other Architectural Uses

Curbing

3.2 Industry

3.2.1 Construction Industry

Manufacture of Magnesium and Dolomite Refractories

for Road Aggregate, Roadstone

3.2.2 Medical Industry

Taken as a Supplement for Calcium or Magnesium

Not Yet Used

3.3 Antiquity Uses

Artifacts, Jewellery, Monuments, Sculpture

Artifacts, Monuments

3.4 Other Uses

3.4.1 Commercial Uses

Cemetery Markers, Creating Artwork, Gemstone, Jewelry, Manufacture of Soap, Solvents, Dyes, Plastics and Fibres, Production of Lime, Source of Magnesia (MgO)

Cemetery Markers, Commemorative Tablets, Creating Artwork

4 Types

4.1 Types

Not Available

Biotite hornfels

4.2 Features

Host Rock for Lead

Smooth to touch

4.3 Archaeological Significance

4.3.1 Monuments

Used

4.3.2 Famous Monuments

Christ the Redeemer in Rio de Janeiro, Stonehenge in English county of Wiltshire

Data Not Available

4.3.3 Sculpture

Used

Not Yet Used

4.3.4 Famous Sculptures

Data Not Available

Not Applicable

4.3.5 Pictographs

Used

4.3.6 Petroglyphs

Used

4.3.7 Figurines

Used

Not Yet Used

4.4 Fossils

Absent

5 Formation

5.1 Formation

Soapstone is a talc-schist, which is a type of metamorphic rock and it is largely composed of the mineral talc and is thus rich inmagnesium.

Due to change in environmental conditions, rocks are heated and pressurized deep inside the Earth's surface. Hornfels is formed from the extreme heat caused by magma or by the intense collisions and friction of tectonic plates.

5.2 Composition

5.2.1 Mineral Content

Albite, Apatite, Biotite, Calcite, Carbonate, Clay Minerals, Hornblende, Ilmenite, Micas, Plagioclase, Pyroxene, Quartz

Andalusite

5.2.2 Compound Content

CaO, Mg, MgO

Fe, Mg

5.3 Transformation

5.3.1 Metamorphism

✔ ✘

50% Metamorphic Rocks Rocks have it !

✔ ✘

50% Metamorphic Rocks Rocks have it !

5.3.2 Types of Metamorphism

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

Not Applicable

5.3.3 Weathering

✔ ✘

65% Metamorphic Rocks Rocks have it !

✔ ✘

65% Metamorphic Rocks Rocks have it !

5.3.4 Types of Weathering

Not Applicable

Biological Weathering

5.3.5 Erosion

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77% Metamorphic Rocks Rocks have it !

✔ ✘

77% Metamorphic Rocks Rocks have it !

5.3.6 Types of Erosion

Not Applicable

Chemical Erosion, Glacier Erosion, Sea Erosion, Water Erosion, Wind Erosion

6 Properties

6.1 Physical Properties

6.1.1 Hardness

2-3

6.1.2 Grain Size

Fine Grained

6.1.3 Fracture

Conchoidal

6.1.4 Streak

Black

Unknown

6.1.5 Porosity

Less Porous

Highly Porous

6.1.6 Luster

Greasy

Shiny

6.1.7 Compressive Strength

What Is Flint

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225.00 N/mm²

Rank: 7 (Overall)▶

5.80 N/mm²

Rank: 31 (Overall)▶

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What Is Obsidian

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▶

175 (What Is Grani..)

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6.1.8 Cleavage

Perfect

6.1.9 Toughness

Not Yet Found

6.1.10 Specific Gravity

2.86

3.4-3.9

6.1.11 Transparency

Opaque

6.1.12 Density

2.8-2.9 g/cm³

0.25-0.30 g/cm³

6.2 Thermal Properties

6.2.1 Specific Heat Capacity

What Is Banded ..

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▶

▼

0.88 kJ/Kg K

Rank: 13 (Overall)▶

0.84 kJ/Kg K

Rank: 15 (Overall)▶

▲

What Is Granulite

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▶

1.09 (What Is Trave..)

◀ ▶ ADD ⊕

6.2.2 Resistance

Heat Resistant, Pressure Resistant

Heat Resistant, Impact Resistant, Pressure Resistant

7 Reserves

7.1 Deposits in Eastern Continents

7.1.1 Asia

China, India, Indonesia, Japan, North Korea, Russia, Saudi Arabia, Singapore, South Korea, Sri Lanka, Tajikistan, Thailand

Bangladesh, Bhutan, China, India, North Korea, Qatar, Russia, Saudi Arabia, South Korea, Thailand

7.1.2 Africa

Egypt, Ethiopia, Ghana, South Africa, Western Africa

Cameroon, East Africa, Tanzania, Western Africa

7.1.3 Europe

Austria, England, Finland, France, Germany, Greece, Spain, Sweden, Switzerland, United Kingdom

United Kingdom

7.1.4 Others

Not Yet Found

7.2 Deposits in Western Continents

7.2.1 North America

Canada, USA

7.2.2 South America

Colombia

Bolivia, Brazil, Colombia, Ecuador

7.3 Deposits in Oceania Continent

7.3.1 Australia

Central Australia, New Zealand, Queensland

New South Wales, New Zealand, Queensland, Western Australia

All about Soapstone and Hornfels Properties

Know all about Soapstone and Hornfels properties here. All properties of rocks are important as they define the type of rock and its application. Soapstone and Hornfels belong to Metamorphic Rocks.Texture of Soapstone is Polished whereas that of Hornfels is Granular, Platy. Soapstone appears Dull, Banded and Foilated and Hornfels appears Dull. The luster of Soapstone is greasy while that of Hornfels is shiny. Soapstone is available in black, black to grey, green, grey colors whereas Hornfels is available in brown, dark greenish - grey, green, reddish brown colors. The commercial uses of Soapstone are cemetery markers, creating artwork, gemstone, jewelry, manufacture of soap, solvents, dyes, plastics and fibres, production of lime, source of magnesia (mgo) and that of Hornfels are cemetery markers, commemorative tablets, creating artwork.