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Tephrite
Tephrite




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Tephrite Rock

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Definition

Definition

Tephrite is an aphanitic to porphyritic textured, volcanic igneous rock

History

Origin

Germany

Discoverer

Van Tooren

Etymology

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

Class

Igneous Rocks

Sub-Class

Durable Rock, Hard Rock

Family

Group

Volcanic

Other Categories

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

Texture

Texture

Aphanitic to Porphyritic

Color

Black, Brown, Green, Grey, White

Maintenance

Less

Durability

Durable

Water Resistant

81% - Igneous Rocks Rocks have it !

Scratch Resistant

86% - Igneous Rocks Rocks have it !

Stain Resistant

66% - Igneous Rocks Rocks

Wind Resistant

49% - Igneous Rocks Rocks have it !

Acid Resistant

48% - Igneous Rocks Rocks

Appearance

Vesicular

Uses

Architecture

Interior Uses

Decorative Aggregates, Flooring, Homes, Interior Decoration

Exterior Uses

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

Other Architectural Uses

Curbing

Industry

Construction Industry

Landscaping

Medical Industry

Not Available

Antiquity Uses

Artifacts, Sculpture

Other Uses

Commercial Uses

Production of Lime, Soil Conditioner

Types

Types

Not Available

Features

Host Rock for Lead

Archaeological Significance

Monuments

Not Yet Used

Famous Monuments

Not Applicable

Sculpture

Used

Famous Sculptures

Not Available

Pictographs

Not Used

Petroglyphs

Not Used

Figurines

Used

Fossils

Absent

Formation

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.

Composition

Mineral Content

Alkali feldspar, Nepheline, Plagioclase, Pyroxene

Compound Content

CaO, Carbon Dioxide, MgO, Silicon Dioxide

Transformation

Metamorphism

97% - Igneous Rocks Rocks have it !

Types of Metamorphism

Cataclastic Metamorphism, Contact Metamorphism, Impact Metamorphism, Regional Metamorphism

Weathering

99% - Igneous Rocks Rocks have it !

Types of Weathering

Biological Weathering, Chemical Weathering, Mechanical Weathering

Erosion

92% - Igneous Rocks Rocks have it !

Types of Erosion

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

Properties

Physical Properties

Hardness

6.5
1 7
👆🏻

Grain Size

Medium to Fine Coarse Grained

Fracture

Uneven

Streak

Bluish Black

Porosity

Very Less Porous

Luster

Subvitreous to Dull

Compressive Strength

90.00 N/mm2
Rank: 22 (Overall)
0.15 450
👆🏻

Cleavage

Crenulation and Pervasive

Toughness

2.4

Specific Gravity

2.86
0 8.4
👆🏻

Transparency

Opaque

Density

2.8-2.9 g/cm3
0 1400
👆🏻

Thermal Properties

Specific Heat Capacity

0.92 kJ/Kg K
Rank: 10 (Overall)
0.14 3.2
👆🏻

Resistance

Heat Resistant, Impact Resistant

Reserves

Deposits in Eastern Continents

Asia

Not Available

Africa

Namibia, Uganda

Europe

Germany, Hungary, Italy, Portugal, Spain

Others

Not Available

Deposits in Western Continents

North America

USA

South America

Not Available

Deposits in Oceania Continent

Australia

New Zealand, Western Australia

Information about Tephrite

Rocks are naturally occurring solids which are composed of minerals & have been used by humans since ages. From Stone Age, rocks are used for various purposes. Also, the metals and minerals found in rock play an important role in our life. Get to know all the Tephrite Uses. We have provided you with all information about Tephrite rock here. Tephrite is an aphanitic to porphyritic textured, volcanic igneous rock. Tephrite is available in black, brown, green, grey, white colors. The streak of a rock is the color of powder produced when it is dragged across an unweathered surface. The streak of Tephrite is bluish black. Get to know more about Tephrite rock and characteristics of Tephrite rock in the next sections.