Foidolite

Borolanite

Foidolite and Borolanite

Foidolite

Borolanite

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Definition

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

Borolanite is a variety of Nepheline Syenite and belongs to igneous rocks and contains nepheline-alkali feldspar pseudomorphs which occur as conspicuous white spots in the dark rock matrix

History

Origin

Scotland

Discoverer

Unknown

Etymology

From the mineral feldspathoid which is the main content of rock

From Alkalic Igneous complex near Loch Borralan in northwest Scotland

Class

Igneous Rocks

Sub-Class

Durable Rock, Soft Rock

Durable Rock, Medium Hardness Rock

Family

Group

Plutonic

Other Categories

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

Fine Grained Rock, Opaque Rock

Texture

Earthy

Granular

Color

Black, Brown, Green, Grey, Pink, White

Brown, Buff, Cream, Green, Grey, Pink, White

Maintenance

Less

Durability

Durable

Water Resistant

✔ ✘

Scratch Resistant

✔ ✘

Stain Resistant

✔ ✘

Wind Resistant

✔ ✘

Acid Resistant

✔ ✘

Appearance

Dull

Banded and Foilated

Uses

Architecture

Interior Uses

Decorative Aggregates, Interior Decoration

Countertops, 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, Cement Manufacture, Construction Aggregate, for Road Aggregate, Landscaping, Making natural cement, Manufacture of Magnesium and Dolomite Refractories, Production of Glass and Ceramics

Medical Industry

Taken as a Supplement for Calcium or Magnesium

Antiquity Uses

Artifacts, Monuments, Sculpture

Artifacts

Other Uses

Commercial Uses

Cemetery Markers, Commemorative Tablets, Creating Artwork

Cemetery Markers

Types

Igneous rock

Features

Host Rock for Lead

Application of acids on the surface causes cloudy frosting, Available in Lots of Colors and Patterns, Dissolves in hydrochloric acid, Is one of the oldest rock

Archaeological Significance

Monuments

Famous Monuments

Sculpture

Famous Sculptures

Pictographs

Petroglyphs

Figurines

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.

Borolanites are formed due to alkaline igneous activities and are generally formed in thick continental crustal areas or in Cordilleran subduction zones.

Composition

Mineral Content

Amphibole, Biotite, Feldspar, Olivine, Plagioclase, Pyroxene

Albite, Amphibole, Biotite, Cancrinite, Feldspar, Hornblende, Plagioclase, Pyroxene, Sodalite

Compound Content

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

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, Hydrothermal Metamorphism, Impact Metamorphism

Regional Metamorphism

Weathering

✔ ✘

Types of Weathering

Chemical Weathering, Mechanical Weathering

Erosion

✔ ✘

Types of Erosion

Wind Erosion

Properties

Physical Properties

Hardness

1.55.5-6

1 7

👆🏻

Grain Size

Medium to Fine Coarse Grained

Fine Grained

Fracture

Conchoidal

Conchoidal to Uneven

Streak

White

Porosity

Very Less Porous

Less Porous

Luster

Subvitreous to Dull

Greasy to Dull

Compressive Strength

80.00 N/mm²150.00 N/mm²

0.15 450

👆🏻

Cleavage

Perfect

Toughness

Specific Gravity

2.862.6

0 8.4

👆🏻

Transparency

Translucent

Translucent to Opaque

Density

-9999 g/cm³2.6 g/cm³

0 1400

👆🏻

Thermal Properties

Specific Heat Capacity

0.79 kJ/Kg K0.84 kJ/Kg K

0.14 3.2

👆🏻

Resistance

Heat Resistant, Wear Resistant

Heat Resistant, Impact Resistant, Wear Resistant

Reserves

Deposits in Eastern Continents

Asia

Russia

Indonesia, Iran, Russia, Saudi Arabia, Sri Lanka, Taiwan, Thailand, Turkey, Turkmenistan, Vietnam

Africa

South Africa, Western Africa

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

Europe

Andorra, Finland, France, Great Britain, Italy, Norway, Portugal, Spain, Sweden

Others

Greenland

Deposits in Western Continents

North America

Canada, USA

South America

Brazil, Chile, Colombia, Uruguay, Venezuela

Deposits in Oceania Continent

Australia

Central Australia, Western Australia

New Zealand, Queensland, South Australia, Tasmania, Western Australia

All about Foidolite and Borolanite Properties

Know all about Foidolite and Borolanite properties here. All properties of rocks are important as they define the type of rock and its application. Foidolite and Borolanite belong to Igneous Rocks.Texture of Foidolite is Earthy whereas that of Borolanite is Granular. Foidolite appears Dull and Borolanite appears Banded and Foilated. The luster of Foidolite is subvitreous to dull while that of Borolanite is greasy to dull. Foidolite is available in black, brown, green, grey, pink, white colors whereas Borolanite is available in brown, buff, cream, green, grey, pink, white colors. The commercial uses of Foidolite and Borolanite are cemetery markers, commemorative tablets, creating artwork.