Lherzolite

Tephrite

Lherzolite and Tephrite

Lherzolite

Tephrite

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Definition

Lherzolite is a type of ultramafic igneous rock which contains essential olivine and clinopyroxene and orthopyroxene in equal proportions

Tephrite is an aphanitic to porphyritic textured, volcanic igneous rock

History

Origin

France

Germany

Discoverer

Unknown

Van Tooren

Etymology

From the Lherz Massif, an alpine peridotite complex, at Étang de Lers, near Massat in the French Pyrenees; Lherz is the archaic spelling of this location

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

Class

Igneous Rocks

Sub-Class

Durable Rock, Hard Rock

Family

Group

Plutonic

Volcanic

Other Categories

Fine Grained Rock, Opaque Rock

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

Texture

Grenue

Aphanitic to Porphyritic

Color

Black, Dark Greenish - Grey, Green, Pink, Purple

Black, Brown, Green, Grey, White

Maintenance

Less

Durability

Durable

Water Resistant

✔ ✘

Scratch Resistant

✔ ✘

Stain Resistant

✔ ✘

Wind Resistant

✔ ✘

Acid Resistant

✔ ✘

Appearance

Glassy, Vesicular and Foilated

Vesicular

Uses

Architecture

Interior Uses

Decorative Aggregates, Entryways, Homes, Interior Decoration

Decorative Aggregates, Flooring, Homes, Interior Decoration

Exterior Uses

As Building Stone, As Facing Stone, Office Buildings

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

Other Architectural Uses

Curbing

Industry

Construction Industry

Landscaping, Manufacture of Magnesium and Dolomite Refractories, Used for flooring, stair treads, borders and window sills.

Landscaping

Medical Industry

Antiquity Uses

Artifacts, Sculpture

Other Uses

Commercial Uses

As armour rock for sea walls, Source of Magnesia (MgO), Used in aquariums

Production of Lime, Soil Conditioner

Types

Garnet Lherzolite

Igneous rock

Features

Host Rock for Lead

Archaeological Significance

Monuments

Famous Monuments

Sculpture

Famous Sculptures

Pictographs

Petroglyphs

Figurines

Fossils

Absent

Formation

Lherzolite 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.

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

Harzburgite, Olivine, Pyroxene, Pyrrhotite

Alkali feldspar, Nepheline, Plagioclase, Pyroxene

Compound Content

CaO, Cr, Chromium(III) Oxide, MgO

CaO, Carbon Dioxide, MgO, Silicon Dioxide

Transformation

Metamorphism

✔ ✘

Types of Metamorphism

Cataclastic Metamorphism, Contact Metamorphism

Cataclastic Metamorphism, Contact Metamorphism, Impact Metamorphism, Regional Metamorphism

Weathering

✔ ✘

Types of Weathering

Biological Weathering, Chemical Weathering, Mechanical Weathering

Erosion

✔ ✘

Types of Erosion

Chemical Erosion, Water Erosion, Wind Erosion

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

Properties

Physical Properties

Hardness

6.56.5

1 7

👆🏻

Grain Size

Fine Grained

Medium to Fine Coarse Grained

Fracture

Conchoidal

Uneven

Streak

White

Bluish Black

Porosity

Less Porous

Very Less Porous

Luster

Subvitreous to Dull

Compressive Strength

290.00 N/mm²90.00 N/mm²

0.15 450

👆🏻

Cleavage

Perfect

Crenulation and Pervasive

Toughness

2.7

2.4

Specific Gravity

2.862.86

0 8.4

👆🏻

Transparency

Opaque

Density

2.8-2.9 g/cm³2.8-2.9 g/cm³

0 1400

👆🏻

Thermal Properties

Specific Heat Capacity

0.95 kJ/Kg K0.92 kJ/Kg K

0.14 3.2

👆🏻

Resistance

Heat Resistant, Impact Resistant, Pressure Resistant, Wear Resistant

Heat Resistant, Impact Resistant

Reserves

Deposits in Eastern Continents

Asia

Russia, South Korea

Africa

Western Africa

Namibia, Uganda

Europe

United Kingdom

Germany, Hungary, Italy, Portugal, Spain

Others

Deposits in Western Continents

North America

USA

South America

Deposits in Oceania Continent

Australia

Central Australia, Western Australia

New Zealand, Western Australia

All about Lherzolite and Tephrite Properties

Know all about Lherzolite and Tephrite properties here. All properties of rocks are important as they define the type of rock and its application. Lherzolite and Tephrite belong to Igneous Rocks.Texture of Lherzolite is Grenue whereas that of Tephrite is Aphanitic to Porphyritic. Lherzolite appears Glassy, Vesicular and Foilated and Tephrite appears Vesicular. The luster of Lherzolite and Tephrite is subvitreous to dull. Lherzolite is available in black, dark greenish - grey, green, pink, purple colors whereas Tephrite is available in black, brown, green, grey, white colors. The commercial uses of Lherzolite are as armour rock for sea walls, source of magnesia (mgo), used in aquariums and that of Tephrite are production of lime, soil conditioner.