Foidolite and Trachyte

Foidolite

Trachyte

Trachyte and Foidolite

Definition

Foidolite is a rare type of coarse-grained intrusive igneous rock with a feldspathoid mineral content greater than 60%

Trachyte is a grey fine-grained volcanic rock which mainly consists of alkali feldspar

History

Discoverer

Unknown

Alexandre Brongniart and René Just Haüy

Etymology

From the mineral feldspathoid which is the main content of rock

From Greek trakhus rough’ or trakhutēs roughness

Class

Igneous Rocks

Sub-Class

Durable Rock, Soft Rock

Durable Rock, Medium Hardness Rock

Family

Group

Plutonic

Volcanic

Other Categories

Coarse Grained Rock, Fine Grained Rock, Medium Grained Rock, Opaque Rock

Fine Grained Rock, Opaque Rock

Texture

Earthy

Aphanitic to Porphyritic

Color

Black, Brown, Colourless, Green, Grey, Pink, White

Black, Brown, Dark Greenish - Grey, Green, Grey, Light to Dark Grey, White

Maintenance

Less

Durability

Durable

Water Resistant

Yes

Scratch Resistant

Yes

Stain Resistant

Yes

Wind Resistant

Yes

Acid Resistant

Appearance

Dull

Banded

Uses

Architecture

Interior Uses

Decorative Aggregates, Interior Decoration

Decorative Aggregates, Flooring, Homes, Interior Decoration

Exterior Uses

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

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

Other Architectural Uses

Curbing

Industry

Construction Industry

As Dimension Stone, Cement Manufacture, for Road Aggregate

As Dimension Stone, Building houses or walls, Cement Manufacture, Construction Aggregate, for Road Aggregate, Landscaping, Making natural cement, Manufacture of Magnesium and Dolomite Refractories

Medical Industry

Taken as a Supplement for Calcium or Magnesium

Not Yet Used

Antiquity Uses

Artifacts, Monuments, Sculpture

Artifacts, Monuments, Sculpture, Small Figurines

Other Uses

Commercial Uses

Cemetery Markers, Commemorative Tablets, Creating Artwork

Cemetery Markers, Creating Artwork

Types

Not Available

Features

Host Rock for Lead

Available in Lots of Colors and Patterns, Is one of the oldest rock, Matrix variable

Archaeological Significance

Monuments

Used

Famous Monuments

Data Not Available

Sculpture

Used

Famous Sculptures

Data Not Available

Pictographs

Used

Petroglyphs

Used

Figurines

Used

Fossils

Absent

Formation

Foidolites 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.

Trachyte is an igneous volcanic rock with an aphanitic to porphyritic texture. It is the volcanic equivalent of syenite rock and forms as a result of magmatic differentiation.

Composition

Mineral Content

Amphibole, Biotite, Feldspar, Olivine, Plagioclase, Pyroxene

Augite, Biotite, Feldspar, Hornblade, Plagioclase, Quartz

Compound Content

Aluminium Oxide, CaO, Iron(III) Oxide, FeO

Potassium Oxide, Sodium Oxide, Silicon Dioxide

Transformation

Metamorphism

Yes

Types of Metamorphism

Burial Metamorphism, Cataclastic Metamorphism, Hydrothermal Metamorphism, Impact Metamorphism

Cataclastic Metamorphism, Contact Metamorphism, Regional Metamorphism

Weathering

Yes

Types of Weathering

Not Applicable

Biological Weathering, Chemical Weathering, Mechanical Weathering

Erosion

Yes

Types of Erosion

Not Applicable

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

Properties

Physical Properties

Hardness

1.5

Grain Size

Medium to Fine Coarse Grained

Fine Grained

Fracture

Conchoidal

Not Available

Streak

White

Porosity

Very Less Porous

Less Porous

Luster

Subvitreous to Dull

Metallic

Compressive Strength

Not Available

150.00 N/mm²

Cleavage

Perfect

Not Available

Toughness

Not Available

Specific Gravity

2.86

2.7

Transparency

Translucent

Opaque

Density

Not Available

2.43-2.45 g/cm³

Thermal Properties

Resistance

Heat Resistant, Wear Resistant

Heat Resistant, Impact Resistant, Wear Resistant

Reserves

Deposits in Eastern Continents

Asia

Russia

China, India, Iran, Saudi Arabia, Sri Lanka, Taiwan, Thailand, Turkey, Vietnam

Africa

South Africa, Western Africa

Angola, Egypt, Madagascar, Namibia, Nigeria, South Africa

Europe

Not Yet Found

Bulgaria, England, Germany, Norway, Romania, Switzerland

Others

Not Yet Found

Deposits in Western Continents

North America

Canada, USA

USA

South America

Not Yet Found

Brazil, Chile

Deposits in Oceania Continent

Australia

Central Australia, Western Australia

New Zealand, Queensland, South Australia, Western Australia

Summary >>

<< Reserves

All about Foidolite and Trachyte Properties

Know all about Foidolite and Trachyte properties here. All properties of rocks are important as they define the type of rock and its application. Foidolite and Trachyte belong to Igneous Rocks.Texture of Foidolite is Earthy whereas that of Trachyte is Aphanitic to Porphyritic. Foidolite appears Dull and Trachyte appears Banded. The luster of Foidolite is subvitreous to dull while that of Trachyte is metallic. Foidolite is available in black, brown, colourless, green, grey, pink, white colors whereas Trachyte is available in black, brown, dark greenish - grey, green, grey, light to dark grey, white colors. The commercial uses of Foidolite and Trachyte are cemetery markers, commemorative tablets, creating artwork.