Hornblendite and Harzburgite

Hornblendite

Harzburgite

Definition

Hornblendite is a type of igneous plutonic rock consisting mainly of amphibole hornblende and is a type of Amphibolite rock

Harzburgite is a plutonic rock of the peridotite group consisting largely of orthopyroxene and olivine

History

Origin

Unknown

Germany

Discoverer

Unknown

Etymology

From German, Horn horn + blende

From the name of a town in Harzburg, Germany

Class

Igneous Rocks

Sub-Class

Durable Rock, Hard Rock

Durable Rock, Medium Hardness Rock

Family

Group

Plutonic

Other Categories

Coarse Grained Rock, Medium Grained Rock, Opaque Rock

Coarse Grained Rock, Opaque Rock

Texture

Banded, Foliated, Massive

Phaneritic

Color

Black, Brown, Green, Grey

Dark Greenish - Grey

Maintenance

Less

Durability

Durable

Water Resistant

Yes

Scratch Resistant

Yes

Stain Resistant

Yes

Wind Resistant

Yes

Acid Resistant

Appearance

Foliated

Rough and Shiny

Uses

Architecture

Interior Uses

Countertops, Decorative Aggregates, Entryways, Flooring, Homes, Hotels, Interior Decoration, Kitchens

Decorative Aggregates, Homes, Interior Decoration

Exterior Uses

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

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

Other Architectural Uses

Curbing

Industry

Construction Industry

As Dimension Stone, Building houses or walls, Cobblestones, Construction Aggregate, for Road Aggregate, Landscaping, Production of Glass and Ceramics, Roadstone

As Dimension Stone, Cobblestones

Medical Industry

Not Yet Used

Antiquity Uses

Artifacts, Sculpture, Small Figurines

Artifacts, Monuments, Sculpture, Small Figurines

Other Uses

Commercial Uses

Cemetery Markers, Commemorative Tablets, Creating Artwork

Creating Artwork, Gemstone, Jewelry, Source of Chromite, Platinum, Nickel and Garnet, Source of Diamonds

Types

Hornblende Gabbro and Hornblende Peridotite

Not Available

Features

Clasts are smooth to touch, Matrix variable, Surfaces are often shiny

Constitutes upper part of the Earth's mantle, Generally rough to touch, Is one of the oldest rock

Archaeological Significance

Monuments

Not Yet Used

Used

Famous Monuments

Not Applicable

Data Not Available

Sculpture

Used

Famous Sculptures

Data Not Available

Pictographs

Not Used

Used

Petroglyphs

Not Used

Used

Figurines

Used

Fossils

Absent

Formation

Hornblendite 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.

Harzburgite 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

Amphibole, Calcite, Hornblade, Magnetite, Plagioclase, Wollastonite

Amphibole, Chromite, Garnet, Magnesium, Olivine, Phlogopite, Plagioclase, Pyroxene

Compound Content

Aluminium Oxide, CaO, Iron(III) Oxide, FeO, Potassium Oxide, MgO, MnO, Sodium Oxide, Phosphorus Pentoxide, Silicon Dioxide, Titanium Dioxide

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

Transformation

Metamorphism

Yes

Types of Metamorphism

Not Applicable

Impact Metamorphism

Weathering

Yes

Types of Weathering

Biological Weathering, Chemical Weathering, Mechanical Weathering

Chemical Weathering, Mechanical Weathering

Erosion

Yes

Types of Erosion

Chemical Erosion, Water Erosion, Wind Erosion

Chemical Erosion, Sea Erosion

Properties

Physical Properties

Hardness

6-7

5.5-6

Grain Size

Medium to Coarse Grained

Coarse Grained

Fracture

Irregular to Conchoidal

Irregular

Streak

White to Grey

White

Porosity

Less Porous

Luster

Vitreous to Dull

Shiny

Cleavage

Irregular

Imperfect

Toughness

2.3

2.1

Specific Gravity

2.5

3-3.01

Transparency

Opaque

Translucent to Opaque

Density

2.85-3.07 g/cm³

3.1-3.4 g/cm³

Thermal Properties

Specific Heat Capacity

Not Available

1.25 kJ/Kg K

Resistance

Heat Resistant, Pressure Resistant, Wear Resistant

Reserves

Deposits in Eastern Continents

Asia

Russia, Turkey

Japan, Oman

Africa

Burundi, Djibouti, Eritrea, Ethiopia, Kenya, Madagascar, Rwanda, Somalia, South Africa, Sudan, Tanzania, Uganda

South Africa

Europe

Germany, Greece, Iceland, Norway, Poland

France, Germany, Italy, Venezuela

Others

Not Yet Found

Hawaii Islands, Mid-Atlantic Ridge

Deposits in Western Continents

North America

Canada, USA

South America

Brazil

Not Yet Found

Deposits in Oceania Continent

Australia

South Australia, Western Australia

Not Yet Found

Summary >>

<< Reserves

All about Hornblendite and Harzburgite Properties

Know all about Hornblendite and Harzburgite properties here. All properties of rocks are important as they define the type of rock and its application. Hornblendite and Harzburgite belong to Igneous Rocks.Texture of Hornblendite is Banded, Foliated, Massive whereas that of Harzburgite is Phaneritic. Hornblendite appears Foliated and Harzburgite appears Rough and Shiny. The luster of Hornblendite is vitreous to dull while that of Harzburgite is shiny. Hornblendite is available in black, brown, green, grey colors whereas Harzburgite is available in dark greenish - grey colors. The commercial uses of Hornblendite are cemetery markers, commemorative tablets, creating artwork and that of Harzburgite are creating artwork, gemstone, jewelry, source of chromite, platinum, nickel and garnet, source of diamonds.