Greywacke

Marble

Greywacke and Marble

Greywacke

Marble

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Definition

Greywacke is defined as a dark coarse-grained sandstone rock which contains more than 15 per cent clay

Marble is a non-foliated metamorphic rock which is composed of recrystallized carbonate which is formed when limestone is exposed to high temperatures and pressures over a long time

History

Origin

Egypt

Discoverer

Unknown

Etymology

From German Grauwacke, from grau grey + wacke

From the Greek marmaros, shining stone and also from the English word marmoreal meaning marble-like

Class

Sedimentary Rocks

Metamorphic Rocks

Sub-Class

Durable Rock, Hard Rock

Durable Rock, Medium Hardness Rock

Family

Group

Other Categories

Fine Grained Rock, Opaque Rock

Medium Grained Rock, Opaque Rock

Texture

Clastic

Granular

Color

Beige, Black, Brown, Cream, Dark Brown, Green, Grey, Light Green, Light to Dark Grey, Pink, Red, White, Yellow

Black, Blue, Brown, Grey, Pink, White

Maintenance

Less

Durability

Durable

Water Resistant

✔ ✘

Scratch Resistant

✔ ✘

Stain Resistant

✔ ✘

Wind Resistant

✔ ✘

Acid Resistant

✔ ✘

Appearance

Dull

Veined and Shiny

Uses

Architecture

Interior Uses

Decorative Aggregates, Floor Tiles, Flooring, Homes, Interior Decoration

Bathrooms, Countertops, Decorative Aggregates, Entryways, Floor Tiles, Homes, Hotels, Interior Decoration, Kitchens, Stair Treads

Exterior Uses

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

Other Architectural Uses

Curbing, Whetstones

Industry

Construction Industry

Building houses or walls, Cement Manufacture, Construction Aggregate, for Road Aggregate, Raw material for the manufacture of mortar

As Dimension Stone

Medical Industry

Antiquity Uses

Artifacts, Sculpture, Small Figurines

Artifacts, Jewellery, Monuments, Sculpture, Small Figurines

Other Uses

Commercial Uses

As armour rock for sea walls, Petroleum reservoirs, Sea Defence, Tombstones

Cemetery Markers, Commemorative Tablets, Creating Artwork, Curling, Laboratory bench tops, Paper Industry, Tombstones, Used in aquariums, Whiting material in toothpaste, paint and paper

Types

Greywacke

Breccia Marble, Carrara Marble, Calacatta marble, Cultured Marble, Polished Marble, Honed Marble, Sand Marble

Features

Available in Lots of Colors and Patterns, Generally rough to touch, Non-vesicular, Veined

Available in Lots of Colors and Patterns, Easily splits into thin plates, Generally rough to touch, Is one of the oldest rock

Archaeological Significance

Monuments

Famous Monuments

Al Aqsa Mosque in Jerusalem, Buland Darwaza in Agra, India, Capitol Hill Building, Washington DC, Charminar in Hyderabad, India, Chhatrapati Shivaji Terminus in Maharashtra, India, Ephesus in Turkey, Faisal Mosque in Islamabad, Pakistan, Humayun's Tomb in Delhi, India, Jama Masjid in Delhi, India, Lotus Temple in New Delhi, India, Louvre in Paris, France, Mysore Palace in Karnataka, India, Neuschwanstein in Bavaria, Palace of Parliament in Bucharest, Romania, Parthenon in Greece, Potala Palace in Lahasa, Tibet, Prophet’s Mosque in Medina, Qutb Minar in India, Saint Basil's Cathedral in Moscow, Russia, St. Peter’s Cathedral in Vatican City, Taj Mahal in Agra, India, Tower of Pisa, Italy, Victoria Memorial in Kolkata, India, Washington Monument, US

Sculpture

Famous Sculptures

Ajanta Caves in Maharashtra, India, Bust of Artemis, Elephanta Caves in Maharashtra, India, Lincoln Memorial in America

Pictographs

Petroglyphs

Figurines

Fossils

Present

Absent

Formation

Graywacke rock is a type of sedimentary rock, which is also known as immature sandstone, which is indurated, dark grey and consisting of poorly sorted angular to sub-angular, sand-sized grains.

Marble is a metamorphic rock produced from limestone in the earth crust. It is formed by the metamorphism of limestone.

Composition

Mineral Content

Augite, Biotite, Calcite, Chlorite, Clay, Clay Minerals, Feldspar, Micas, Muscovite or Illite, Plagioclase, Pyroxene, Quartz

Garnet, Graphite, Olivine, Pyrite, Quartz

Compound Content

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

CaO, Iron(III) Oxide, FeO, MgO, Silicon Dioxide

Transformation

Metamorphism

✔ ✘

Types of Metamorphism

Impact Metamorphism

Weathering

✔ ✘

Types of Weathering

Biological Weathering, Chemical Weathering

Biological Weathering, Chemical Weathering, Mechanical Weathering

Erosion

✔ ✘

Types of Erosion

Coastal Erosion, Sea Erosion, Wind Erosion

Chemical Erosion, Coastal Erosion

Properties

Physical Properties

Hardness

6-73-4

1 7

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Grain Size

Angular and Fine

Medium Grained

Fracture

Conchoidal

Streak

White

Porosity

Highly Porous

Less Porous

Luster

Dull

Dull to Pearly to Subvitreous

Compressive Strength

120.00 N/mm²115.00 N/mm²

0.15 450

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Cleavage

Perfect

Toughness

2.6

Specific Gravity

2.2-2.82.86-2.87

0 8.4

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Transparency

Opaque

Density

2.6-2.61 g/cm³2.4-2.7 g/cm³

0 1400

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Thermal Properties

Specific Heat Capacity

0.71 kJ/Kg K0.88 kJ/Kg K

0.14 3.2

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Resistance

Heat Resistant, Impact Resistant, Pressure Resistant

Heat Resistant

Reserves

Deposits in Eastern Continents

Asia

China, India, Kazakhstan, Mongolia, Russia, Uzbekistan

China, India

Africa

Namibia, Nigeria, South Africa

Namibia

Europe

Austria, Denmark, Germany, Great Britain, Netherlands, Norway, Poland, Sweden, Switzerland, United Kingdom

Italy, Spain

Others

Greenland

Deposits in Western Continents

North America

Canada, USA

South America

Brazil

Deposits in Oceania Continent

Australia

New South Wales, New Zealand

New South Wales, New Zealand, Queensland, Victoria

All about Greywacke and Marble Properties

Know all about Greywacke and Marble properties here. All properties of rocks are important as they define the type of rock and its application. Greywacke belongs to Sedimentary Rocks while Marble belongs to Metamorphic Rocks.Texture of Greywacke is Clastic whereas that of Marble is Granular. Greywacke appears Dull and Marble appears Veined and Shiny. The luster of Greywacke is dull while that of Marble is dull to pearly to subvitreous. Greywacke is available in beige, black, brown, cream, dark brown, green, grey, light green, light to dark grey, pink, red, white, yellow colors whereas Marble is available in black, blue, brown, grey, pink, white colors. The commercial uses of Greywacke are as armour rock for sea walls, petroleum reservoirs, sea defence, tombstones and that of Marble are cemetery markers, commemorative tablets, creating artwork, curling, laboratory bench tops, paper industry, tombstones, used in aquariums, whiting material in toothpaste, paint and paper.