Tephrite

Pumice

Tephrite and Pumice

Tephrite

Pumice

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1 Definition

1.1 Definition

Tephrite is an aphanitic to porphyritic textured, volcanic igneous rock

Pumice is a volcanic rock that consists of highly vesicular rough textured volcanic glass, which may or may not contain crystals

1.2 History

1.2.1 Origin

Germany

Spain

1.2.2 Discoverer

Van Tooren

Unknown

1.3 Etymology

From Greek tephra, ashes from Indo-European base, to burn

From Old French pomis, from a Latin dialect variant of pumex

1.4 Class

Igneous Rocks

1.4.1 Sub-Class

Durable Rock, Hard Rock

Durable Rock, Medium Hardness Rock

1.5 Family

1.5.1 Group

Volcanic

1.6 Other Categories

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

Fine Grained Rock, Opaque Rock

2 Texture

2.1 Texture

Aphanitic to Porphyritic

Vesicular

2.2 Color

Black, Brown, Colourless, Green, Grey, White

Beige, Colourless, Grey, Light Green, Light Grey, Pink, White, Yellow- grey

2.3 Maintenance

Less

2.4 Durability

Durable

2.4.1 Water Resistant

✔ ✘

81% Igneous Rocks Rocks have it !

✔ ✘

81% Igneous Rocks Rocks have it !

2.4.2 Scratch Resistant

✔ ✘

86% Igneous Rocks Rocks have it !

✔ ✘

86% Igneous Rocks Rocks have it !

2.4.3 Stain Resistant

✔ ✘

66% Igneous Rocks Rocks have it !

✔ ✘

66% Igneous Rocks Rocks have it !

2.4.4 Wind Resistant

✔ ✘

49% Igneous Rocks Rocks have it !

✔ ✘

49% Igneous Rocks Rocks have it !

2.4.5 Acid Resistant

✔ ✘

48% Igneous Rocks Rocks have it !

✔ ✘

48% Igneous Rocks Rocks have it !

2.5 Appearance

Vesicular

3 Uses

3.1 Architecture

3.1.1 Interior Uses

Decorative Aggregates, Flooring, Homes, Interior Decoration

3.1.2 Exterior Uses

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

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

3.1.3 Other Architectural Uses

Curbing

Curbing, Powder

3.2 Industry

3.2.1 Construction Industry

Landscaping

As Dimension Stone, Cement Manufacture, for Road Aggregate, In landscaping and horticulture, Making natural cement, Production of lightweight concrete blocks

3.2.2 Medical Industry

Not Yet Used

As an abrasive in skin exfoliating products, In Chemical and Pharmaceutical Industry, Medicines and Cosmetics

3.3 Antiquity Uses

Artifacts, Sculpture

Artifacts

3.4 Other Uses

3.4.1 Commercial Uses

Production of Lime, Soil Conditioner

As a traction material on snow-covered roads, As an abrasive in pencil erasers, Fine abrasive used for polishing, Manufacture of Soap, Solvents, Dyes, Plastics and Fibres, Used in aquariums

4 Types

4.1 Types

Not Available

Scoria

4.2 Features

Host Rock for Lead

4.3 Archaeological Significance

4.3.1 Monuments

Not Yet Used

4.3.2 Famous Monuments

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

Used

4.3.6 Petroglyphs

Not Used

Used

4.3.7 Figurines

Used

Not Yet Used

4.4 Fossils

Absent

5 Formation

5.1 Formation

Tephrite is a fine-grained, hard rock which is a type of metasomatite, essentially altered basalt. It forms with or without crystallization, either below the surface as intrusive rocks or on the surface as extrusive rocks.

Pumice rock forms when the magma cools so quickly that atoms in the melt are not able to arrange themselves into a crystalline structure.

5.2 Composition

5.2.1 Mineral Content

Alkali feldspar, Nepheline, Plagioclase, Pyroxene

Aluminum Oxides, Calcite, Carbonate, Iron Oxides, Silica

5.2.2 Compound Content

CaO, Carbon Dioxide, MgO, Silicon Dioxide

Al, Aluminium Oxide, CaO, Carbon Dioxide, MgO, Silicon Dioxide

5.3 Transformation

5.3.1 Metamorphism

✔ ✘

97% Igneous Rocks Rocks have it !

✔ ✘

97% Igneous Rocks Rocks have it !

5.3.2 Types of Metamorphism

Cataclastic Metamorphism, Contact Metamorphism, Impact Metamorphism, Regional Metamorphism

Burial Metamorphism, Impact Metamorphism

5.3.3 Weathering

✔ ✘

99% Igneous Rocks Rocks have it !

✔ ✘

99% Igneous Rocks Rocks have it !

5.3.4 Types of Weathering

Biological Weathering, Chemical Weathering, Mechanical Weathering

5.3.5 Erosion

✔ ✘

92% Igneous Rocks Rocks have it !

✔ ✘

92% Igneous Rocks Rocks have it !

5.3.6 Types of Erosion

Chemical Erosion, Coastal Erosion, Glacier Erosion, Sea Erosion, Water Erosion

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

6 Properties

6.1 Physical Properties

6.1.1 Hardness

6.5

6.1.2 Grain Size

Medium to Fine Coarse Grained

Fine Grained

6.1.3 Fracture

Uneven

Planar

6.1.4 Streak

Bluish Black

White, Greenish White or Grey

6.1.5 Porosity

Very Less Porous

Highly Porous

6.1.6 Luster

Subvitreous to Dull

Earthy

6.1.7 Compressive Strength

What Is Flint

⊕

▶

▼

90.00 N/mm²

Rank: 22 (Overall)▶

51.20 N/mm²

Rank: 26 (Overall)▶

▲

What Is Obsidian

⊕

▶

175 (What Is Grani..)

◀ ▶ ADD ⊕

6.1.8 Cleavage

Crenulation and Pervasive

Perfect

6.1.9 Toughness

2.4

6.1.10 Specific Gravity

2.86

6.1.11 Transparency

Opaque

6.1.12 Density

2.8-2.9 g/cm³

0.25-0.3 g/cm³

6.2 Thermal Properties

6.2.1 Specific Heat Capacity

What Is Banded ..

⊕

▶

▼

0.92 kJ/Kg K

Rank: 10 (Overall)▶

0.87 kJ/Kg K

Rank: 14 (Overall)▶

▲

What Is Granulite

⊕

▶

1.09 (What Is Trave..)

◀ ▶ ADD ⊕

6.2.2 Resistance

Heat Resistant, Impact Resistant

Impact Resistant, Pressure Resistant

7 Reserves

7.1 Deposits in Eastern Continents

7.1.1 Asia

Not Yet Found

Afghanistan, Indonesia, Japan, Russia

7.1.2 Africa

Namibia, Uganda

Ethiopia, Kenya, Tanzania

7.1.3 Europe

Germany, Hungary, Italy, Portugal, Spain

Greece, Hungary, Iceland, Italy, Turkey

7.1.4 Others

Not Yet Found

7.2 Deposits in Western Continents

7.2.1 North America

USA

Bahamas, Barbados, Canada, Costa Rica, Cuba, Jamaica, Mexico, USA

7.2.2 South America

Not Yet Found

Argentina, Chile, Ecuador, Peru

7.3 Deposits in Oceania Continent

7.3.1 Australia

New Zealand, Western Australia

All about Tephrite and Pumice Properties

Know all about Tephrite and Pumice properties here. All properties of rocks are important as they define the type of rock and its application. Tephrite and Pumice belong to Igneous Rocks.Texture of Tephrite is Aphanitic to Porphyritic whereas that of Pumice is Vesicular. Tephrite appears Vesicular and Pumice appears Vesicular. The luster of Tephrite is subvitreous to dull while that of Pumice is earthy. Tephrite is available in black, brown, colourless, green, grey, white colors whereas Pumice is available in beige, colourless, grey, light green, light grey, pink, white, yellow- grey colors. The commercial uses of Tephrite are production of lime, soil conditioner and that of Pumice are as a traction material on snow-covered roads, as an abrasive in pencil erasers, fine abrasive used for polishing, manufacture of soap, solvents, dyes, plastics and fibres, used in aquariums.