Scoria

Quartzite

Scoria and Quartzite

Scoria

Quartzite

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Definition

Scoria is a dark-colored extrusive igneous rock with abundant round bubble-like cavities

Quartzite is a non-foliated metamorphic rock that forms by the metamorphism of pure quartz Sandstone

History

Origin

Discoverer

Unknown

Etymology

From late Middle English (denoting slag from molten metal), from Greek skōria refuse, from skōr dung

From quartz + -ite

Class

Igneous Rocks

Metamorphic Rocks

Sub-Class

Durable Rock, Medium Hardness Rock

Durable Rock, Hard Rock

Family

Group

Volcanic

Other Categories

Fine Grained Rock, Opaque Rock

Medium Grained Rock, Opaque Rock

Texture

Vesicular

Foliated, Granular

Color

Black, Brown, Dark Grey to Black, Red

Black, Blue, Brown, Green, Light Grey, Purple, White, Yellow

Maintenance

Less

Durability

Durable

Water Resistant

✔ ✘

Scratch Resistant

✔ ✘

Stain Resistant

✔ ✘

Wind Resistant

✔ ✘

Acid Resistant

✔ ✘

Appearance

Glassy and Vesicular

Lustrous

Uses

Architecture

Interior Uses

Decorative Aggregates, Interior Decoration

Countertops, Decorative Aggregates, Flooring, Homes

Exterior Uses

Garden Decoration, Paving Stone

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

Other Architectural Uses

Curbing

Industry

Construction Industry

Cement Manufacture, Construction Aggregate, for Road Aggregate, In landscaping and drainage works

Arrowheads, As Dimension Stone, Cement Manufacture, Construction Aggregate, Cutting Tool, for Road Aggregate, Making natural cement, Production of Glass and Ceramics, Rail Track Ballast, Roadstone

Medical Industry

Antiquity Uses

Artifacts, Monuments, Sculpture

Artifacts, Jewellery, Monuments, Sculpture

Other Uses

Commercial Uses

As a traction material on snow-covered roads, Creating Artwork, High-temperature insulation, In gas barbecue grills

An Oil and Gas Reservoir, As armour rock for sea walls, Cemetery Markers, Commemorative Tablets, In aquifers, Laboratory bench tops, Petroleum reservoirs, Soil Conditioner, Source of Magnesia (MgO), Tombstones, Used in aquariums

Types

Basaltic Scoria and Andesitic Scoria

Orthoquartzite and Metaquartzite

Features

Available in Lots of Colors and Patterns, Generally rough to touch, Surfaces are often shiny

Generally rough to touch, Is one of the oldest rock

Archaeological Significance

Monuments

Famous Monuments

Sculpture

Famous Sculptures

Pictographs

Petroglyphs

Figurines

Fossils

Absent

Formation

Scoria forms when magma containing huge amount of dissolved gas flows from a volcano during an eruption.

Quartzite forms from sandstone and the mineral quartz being put under extreme heat and pressure.

Composition

Mineral Content

Apatite, Biotite, Calcite, Feldspar, Hematite, Hornblade, Ilmenite, Magnetite, Olivine, Pyroxene, Quartz, Silica

Chlorite, Epidote, Hematite, Kyanite, Magnetite, Muscovite or Illite, Quartz

Compound Content

Ca, NaCl

Aluminium Oxide, CaO, Iron(III) Oxide, MgO, Sodium Oxide, Silicon Dioxide

Transformation

Metamorphism

✔ ✘

Types of Metamorphism

Burial Metamorphism, Cataclastic Metamorphism, Contact Metamorphism

Burial Metamorphism, Cataclastic Metamorphism, Hydrothermal Metamorphism, Regional Metamorphism

Weathering

✔ ✘

Types of Weathering

Biological Weathering, Chemical Weathering, Mechanical Weathering

Erosion

✔ ✘

Types of Erosion

Chemical Erosion, Coastal Erosion, Glacier Erosion

Chemical Erosion, Coastal Erosion, Water Erosion, Wind Erosion

Properties

Physical Properties

Hardness

5-66-7

1 7

👆🏻

Grain Size

Fine Grained

Medium Grained

Fracture

Conchoidal

Uneven, Splintery or Conchoidal

Streak

White

Porosity

Highly Porous

Less Porous

Luster

Subvitreous to Dull

Vitreous

Compressive Strength

70.00 N/mm²115.00 N/mm²

0.15 450

👆🏻

Cleavage

Perfect

Indiscernible

Toughness

2.1

1.9

Specific Gravity

-99992.6-2.8

0 8.4

👆🏻

Transparency

Opaque

Transparent to Translucent

Density

-9999 g/cm³2.32-2.42 g/cm³

0 1400

👆🏻

Thermal Properties

Specific Heat Capacity

0.84 kJ/Kg K0.75 kJ/Kg K

0.14 3.2

👆🏻

Resistance

Heat Resistant, Impact Resistant, Pressure Resistant, Wear Resistant

Reserves

Deposits in Eastern Continents

Asia

Afghanistan, Indonesia, Japan, Russia

China, India, Israel, Russia, South Korea, Thailand, Turkey

Africa

Ethiopia, Kenya, Tanzania

Ethiopia, Morocco, South Africa, Zimbabwe

Europe

Greece, Hungary, Iceland, Italy, Turkey

England, Italy, Norway, Scotland, Sweden, United Kingdom

Others

Greenland

Deposits in Western Continents

North America

Bahamas, Barbados, Canada, Costa Rica, Cuba, Jamaica, Mexico, USA

Bahamas, Canada, USA

South America

Argentina, Chile, Ecuador, Peru

Brazil, Colombia, Venezuela

Deposits in Oceania Continent

Australia

New Zealand, Western Australia

New Zealand, Queensland, Western Australia

All about Scoria and Quartzite Properties

Know all about Scoria and Quartzite properties here. All properties of rocks are important as they define the type of rock and its application. Scoria belongs to Igneous Rocks while Quartzite belongs to Metamorphic Rocks.Texture of Scoria is Vesicular whereas that of Quartzite is Foliated, Granular. Scoria appears Glassy and Vesicular and Quartzite appears Lustrous. The luster of Scoria is subvitreous to dull while that of Quartzite is vitreous. Scoria is available in black, brown, dark grey to black, red colors whereas Quartzite is available in black, blue, brown, green, light grey, purple, white, yellow colors. The commercial uses of Scoria are as a traction material on snow-covered roads, creating artwork, high-temperature insulation, in gas barbecue grills and that of Quartzite are an oil and gas reservoir, as armour rock for sea walls, cemetery markers, commemorative tablets, in aquifers, laboratory bench tops, petroleum reservoirs, soil conditioner, source of magnesia (mgo), tombstones, used in aquariums.