Trachyte

Luxullianite

Trachyte and Luxullianite

Trachyte

Luxullianite

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Definition

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

Luxullianite is a rare type of granite, known for presence of clusters of radially arranged acicular tourmaline crystals which are enclosed by phenocrysts of orthoclase and quartz in a matrix of quartz, tourmaline, alkali feldspar, brown mica.

History

Origin

England

Discoverer

Alexandre Brongniart and René Just Haüy

Unknown

Etymology

From Greek trakhus rough’ or trakhutēs roughness

From the village of Luxulyan in Cornwall, England, where this variety of granite is found

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, Opaque Rock

Texture

Aphanitic to Porphyritic

Granular, Phaneritic

Color

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

Black, Grey, Orange, Pink, White

Maintenance

Less

Durability

Durable

Water Resistant

✔ ✘

Scratch Resistant

✔ ✘

Stain Resistant

✔ ✘

Wind Resistant

✔ ✘

Acid Resistant

✔ ✘

Appearance

Banded

Veined or Pebbled

Uses

Architecture

Interior Uses

Decorative Aggregates, 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, Paving Stone, Garden Decoration, Office Buildings

Other Architectural Uses

Curbing

Industry

Construction Industry

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

As Dimension Stone

Medical Industry

Antiquity Uses

Artifacts, Monuments, Sculpture, Small Figurines

Artifacts, Monuments, Sculpture

Other Uses

Commercial Uses

Cemetery Markers, Creating Artwork

Creating Artwork, Curling, Gemstone, Laboratory bench tops, Tombstones

Types

Felsic volcanic rock

Igneous Protolith Granite, Sedimentary Protolith Granite, Mantle Granite, Anorogenic Granite and Hybrid Granite

Features

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

Available in Lots of Colors and Patterns, It is One of the Oldest, Strongest and Hardest Rock

Archaeological Significance

Monuments

Famous Monuments

Sculpture

Famous Sculptures

Pictographs

Petroglyphs

Figurines

Fossils

Absent

Formation

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.

Luxullianite is an intrusive igneous rock which is very hard, crystalline and is visibly homogeneous in texture. It is found in large plutons on the continents, i.e. in areas where the Earth's crust has been deeply eroded.

Composition

Mineral Content

Augite, Biotite, Feldspar, Hornblade, Plagioclase, Quartz

Amphibole, Biotite, Feldspar, Hornblade, Micas, Muscovite or Illite, Plagioclase, Pyroxene, Quartz

Compound Content

Potassium Oxide, Sodium Oxide, Silicon Dioxide

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

Transformation

Metamorphism

✔ ✘

Types of Metamorphism

Cataclastic Metamorphism, Contact Metamorphism, Regional Metamorphism

Burial Metamorphism, Cataclastic Metamorphism, Contact Metamorphism, Hydrothermal Metamorphism, Impact Metamorphism

Weathering

✔ ✘

Types of Weathering

Biological Weathering, Chemical Weathering, Mechanical Weathering

Erosion

✔ ✘

Types of Erosion

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

Chemical Erosion, Water Erosion, Wind Erosion

Properties

Physical Properties

Hardness

66-7

1 7

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Grain Size

Fine Grained

Large and Coarse Grained

Fracture

Streak

White

Porosity

Less Porous

Luster

Metallic

Dull to Grainy with Sporadic parts Pearly and Vitreous

Compressive Strength

150.00 N/mm²175.00 N/mm²

0.15 450

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Cleavage

Toughness

Specific Gravity

2.72.6-2.7

0 8.4

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Transparency

Opaque

Density

2.43-2.45 g/cm³2.6-2.8 g/cm³

0 1400

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Thermal Properties

Specific Heat Capacity

0.84 kJ/Kg K0.79 kJ/Kg K

0.14 3.2

👆🏻

Resistance

Heat Resistant, Impact Resistant, Wear Resistant

Heat Resistant, Wear Resistant

Reserves

Deposits in Eastern Continents

Asia

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

Africa

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

Europe

Bulgaria, England, Germany, Norway, Romania, Switzerland

Austria, Belgium, Finland, France, Germany, Italy, Norway, Sardinia, Spain, Switzerland, The Czech Republic

Others

Deposits in Western Continents

North America

USA

Canada, USA

South America

Brazil, Chile

Deposits in Oceania Continent

Australia

New Zealand, Queensland, South Australia, Western Australia

All about Trachyte and Luxullianite Properties

Know all about Trachyte and Luxullianite properties here. All properties of rocks are important as they define the type of rock and its application. Trachyte and Luxullianite belong to Igneous Rocks.Texture of Trachyte is Aphanitic to Porphyritic whereas that of Luxullianite is Granular, Phaneritic. Trachyte appears Banded and Luxullianite appears Veined or Pebbled. The luster of Trachyte is metallic while that of Luxullianite is dull to grainy with sporadic parts pearly and vitreous. Trachyte is available in black, brown, dark greenish - grey, green, grey, light to dark grey, white colors whereas Luxullianite is available in black, grey, orange, pink, white colors. The commercial uses of Trachyte are cemetery markers, creating artwork and that of Luxullianite are creating artwork, curling, gemstone, laboratory bench tops, tombstones.