Harzburgite

Picrite

Harzburgite and Picrite

Harzburgite

Picrite

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Definition

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

Picrite is a variety of high-magnesium olivine basalt that is very rich in the mineral olivine

History

Origin

Germany

Hawaii Islands

Discoverer

Unknown

Etymology

From the name of a town in Harzburg, Germany

From Greek pikros bitter + -ite, 19th century

Class

Igneous Rocks

Sub-Class

Durable Rock, Medium Hardness Rock

Durable Rock, Hard Rock

Family

Group

Plutonic

Volcanic

Other Categories

Coarse Grained Rock, Opaque Rock

Fine Grained Rock, Opaque Rock

Texture

Phaneritic

Earthy, Rough

Color

Dark Greenish - Grey

Black, Brown, Green, Grey, Pink, White, Yellow

Maintenance

Less

Durability

Durable

Water Resistant

✔ ✘

Scratch Resistant

✔ ✘

Stain Resistant

✔ ✘

Wind Resistant

✔ ✘

Acid Resistant

✔ ✘

Appearance

Rough and Shiny

Uses

Architecture

Interior Uses

Decorative Aggregates, Homes, Interior Decoration

Countertops, Decorative Aggregates, Homes, Interior Decoration

Exterior Uses

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

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

Other Architectural Uses

Curbing

Industry

Construction Industry

As Dimension Stone, Cobblestones

As a Sintering Agent in Steel Industry to process Iron Ore, Cement Manufacture, for Road Aggregate, Manufacture of Magnesium and Dolomite Refractories, Roadstone, Used for flooring, stair treads, borders and window sills.

Medical Industry

Antiquity Uses

Artifacts, Monuments, Sculpture, Small Figurines

Artifacts, Monuments, Sculpture

Other Uses

Commercial Uses

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

As a Feed Additive for Livestock, As armour rock for sea walls, Metallurgical Flux, Pottery, Source of Magnesia (MgO)

Types

Ultramafic rock

Oceanite

Features

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

Host Rock for Lead

Archaeological Significance

Monuments

Famous Monuments

Sculpture

Famous Sculptures

Pictographs

Petroglyphs

Figurines

Fossils

Absent

Formation

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.

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

Biotite, Olivine, Plagioclase, Pyrrhotite

Compound Content

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

Al, CaO, Carbon Dioxide, Mg, MgO

Transformation

Metamorphism

✔ ✘

Types of Metamorphism

Impact Metamorphism

Burial Metamorphism, Cataclastic Metamorphism, Impact Metamorphism, Regional Metamorphism

Weathering

✔ ✘

Types of Weathering

Chemical Weathering, Mechanical Weathering

Biological Weathering

Erosion

✔ ✘

Types of Erosion

Chemical Erosion, Sea Erosion

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

Properties

Physical Properties

Hardness

5.5-66.8

1 7

👆🏻

Grain Size

Coarse Grained

Fine Grained

Fracture

Irregular

Uneven

Streak

White

White, Greenish White or Grey

Porosity

Less Porous

Luster

Shiny

Subvitreous to Dull

Compressive Strength

150.00 N/mm²189.00 N/mm²

0.15 450

👆🏻

Cleavage

Toughness

2.1

Specific Gravity

3-3.012.75-2.92

0 8.4

👆🏻

Transparency

Translucent to Opaque

Opaque

Density

3.1-3.4 g/cm³1.5-2.5 g/cm³

0 1400

👆🏻

Thermal Properties

Specific Heat Capacity

1.25 kJ/Kg K0.88 kJ/Kg K

0.14 3.2

👆🏻

Resistance

Heat Resistant, Pressure Resistant, Wear Resistant

Heat Resistant

Reserves

Deposits in Eastern Continents

Asia

Japan, Oman

India, Russia

Africa

South Africa

Europe

France, Germany, Italy

Iceland

Others

Hawaii Islands, Mid-Atlantic Ridge

Deposits in Western Continents

North America

Canada, USA

South America

Brazil

Deposits in Oceania Continent

Australia

All about Harzburgite and Picrite Properties

Know all about Harzburgite and Picrite properties here. All properties of rocks are important as they define the type of rock and its application. Harzburgite and Picrite belong to Igneous Rocks.Texture of Harzburgite is Phaneritic whereas that of Picrite is Earthy, Rough. Harzburgite appears Rough and Shiny and Picrite appears Rough and Shiny. The luster of Harzburgite is shiny while that of Picrite is subvitreous to dull. Harzburgite is available in dark greenish - grey colors whereas Picrite is available in black, brown, green, grey, pink, white, yellow colors. The commercial uses of Harzburgite are creating artwork, gemstone, jewelry, source of chromite, platinum, nickel and garnet, source of diamonds and that of Picrite are as a feed additive for livestock, as armour rock for sea walls, metallurgical flux, pottery, source of magnesia (mgo).