Scoria

Hornblendite

Scoria and Hornblendite

Scoria

Hornblendite

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Definition

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

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

History

Origin

Discoverer

Unknown

Etymology

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

From German, Horn horn + blende

Class

Igneous Rocks

Sub-Class

Durable Rock, Medium Hardness Rock

Durable Rock, Hard Rock

Family

Group

Volcanic

Plutonic

Other Categories

Fine Grained Rock, Opaque Rock

Coarse Grained Rock, Medium Grained Rock, Opaque Rock

Texture

Vesicular

Banded, Foliated, Massive

Color

Black, Brown, Dark Grey to Black, Red

Black, Brown, Green, Grey

Maintenance

Less

Durability

Durable

Water Resistant

✔ ✘

Scratch Resistant

✔ ✘

Stain Resistant

✔ ✘

Wind Resistant

✔ ✘

Acid Resistant

✔ ✘

Appearance

Glassy and Vesicular

Foliated

Uses

Architecture

Interior Uses

Decorative Aggregates, Interior Decoration

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

Exterior Uses

Garden Decoration, Paving Stone

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

Other Architectural Uses

Curbing

Industry

Construction Industry

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

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

Medical Industry

Antiquity Uses

Artifacts, Monuments, Sculpture

Artifacts, Sculpture, Small Figurines

Other Uses

Commercial Uses

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

Cemetery Markers, Commemorative Tablets, Creating Artwork

Types

Basaltic Scoria and Andesitic Scoria

Hornblende Gabbro and Hornblende Peridotite

Features

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

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

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.

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.

Composition

Mineral Content

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

Amphibole, Calcite, Hornblade, Magnetite, Plagioclase, Wollastonite

Compound Content

Ca, NaCl

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

Transformation

Metamorphism

✔ ✘

Types of Metamorphism

Burial Metamorphism, Cataclastic Metamorphism, Contact Metamorphism

Weathering

✔ ✘

Types of Weathering

Biological Weathering, Chemical Weathering, Mechanical Weathering

Erosion

✔ ✘

Types of Erosion

Chemical Erosion, Coastal Erosion, Glacier Erosion

Chemical Erosion, Water Erosion, Wind Erosion

Properties

Physical Properties

Hardness

5-66-7

1 7

👆🏻

Grain Size

Fine Grained

Medium to Coarse Grained

Fracture

Conchoidal

Irregular to Conchoidal

Streak

White

White to Grey

Porosity

Highly Porous

Less Porous

Luster

Subvitreous to Dull

Vitreous to Dull

Compressive Strength

70.00 N/mm²250.00 N/mm²

0.15 450

👆🏻

Cleavage

Perfect

Toughness

2.1

2.3

Specific Gravity

-99992.5

0 8.4

👆🏻

Transparency

Opaque

Density

-9999 g/cm³2.85-3.07 g/cm³

0 1400

👆🏻

Thermal Properties

Specific Heat Capacity

0.84 kJ/Kg K0.84 kJ/Kg K

0.14 3.2

👆🏻

Resistance

Heat Resistant, Impact Resistant, Pressure Resistant, Wear Resistant

Heat Resistant, Pressure Resistant, Wear Resistant

Reserves

Deposits in Eastern Continents

Asia

Afghanistan, Indonesia, Japan, Russia

Russia, Turkey

Africa

Ethiopia, Kenya, Tanzania

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

Europe

Greece, Hungary, Iceland, Italy, Turkey

Germany, Greece, Iceland, Norway, Poland

Others

Deposits in Western Continents

North America

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

Canada, USA

South America

Argentina, Chile, Ecuador, Peru

Brazil

Deposits in Oceania Continent

Australia

New Zealand, Western Australia

South Australia, Western Australia

All about Scoria and Hornblendite Properties

Know all about Scoria and Hornblendite properties here. All properties of rocks are important as they define the type of rock and its application. Scoria and Hornblendite belong to Igneous Rocks.Texture of Scoria is Vesicular whereas that of Hornblendite is Banded, Foliated, Massive. Scoria appears Glassy and Vesicular and Hornblendite appears Foliated. The luster of Scoria is subvitreous to dull while that of Hornblendite is vitreous to dull. Scoria is available in black, brown, dark grey to black, red colors whereas Hornblendite is available in black, brown, green, grey 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 Hornblendite are cemetery markers, commemorative tablets, creating artwork.