Comendite

Larvikite

Comendite and Larvikite

Comendite

Larvikite

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Definition

Comendite is a hard, peralkaline igneous rock, a type of light blue grey rhyolite

Larvikite is an igneous rock and a variety of monzonite, notable for the presence of thumbnail-sized crystals of feldspar

History

Origin

Italy

Larvik, Norway

Discoverer

Unknown

Etymology

Comendite derives its name from the area of Le Commende on San Pietro Island in Italy

From the town of Larvik in Norway, where this type of igneous rock is found

Class

Igneous Rocks

Sub-Class

Durable Rock, Hard Rock

Family

Group

Volcanic

Plutonic

Other Categories

Medium Grained Rock, Opaque Rock

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

Texture

Porphyritic

Phaneritic

Color

Blue, Bluish - Grey

Black, Brown, Light to Dark Grey, White

Maintenance

Less

Durability

Durable

Water Resistant

✔ ✘

Scratch Resistant

✔ ✘

Stain Resistant

✔ ✘

Wind Resistant

✔ ✘

Acid Resistant

✔ ✘

Appearance

Foliated

Shiny

Uses

Architecture

Interior Uses

Countertops, Decorative Aggregates, Interior Decoration

Decorative Aggregates, Homes, Interior Decoration

Exterior Uses

As Building Stone, As Facing Stone, Garden Decoration

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

Other Architectural Uses

Curbing

Industry

Construction Industry

Building houses or walls, Cement Manufacture, Construction Aggregate, for Road Aggregate, Landscaping, Making natural cement, Raw material for the manufacture of mortar

As Dimension Stone, Cement Manufacture, Construction Aggregate, for Road Aggregate

Medical Industry

Antiquity Uses

Artifacts

Artifacts, Monuments, Sculpture

Other Uses

Commercial Uses

Cemetery Markers

Cemetery Markers, Commemorative Tablets, Creating Artwork

Types

Rhyolite

Quartz Monzonite, Syenite and Diorite

Features

Very fine grained rock, It is One of the Oldest, Strongest and Hardest Rock

Available in lots of colors, Is one of the oldest rock

Archaeological Significance

Monuments

Famous Monuments

Sculpture

Famous Sculptures

Pictographs

Petroglyphs

Figurines

Fossils

Absent

Formation

Comendite is a type of Igneous rock which is formed due to cooling and solidification of lava or magma. It may form with or without crystallization, either below the surface as intrusive rocks or on the surface as extrusive rocks.

Larvikite 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

Albite, Amphibole, Quartz

Albite, Amphibole, Apatite, Biotite, Feldspar, Hornblade, Ilmenite, Magnetite, Muscovite or Illite, Olivine, Plagioclase, Pyroxene, Quartz, Sulfides, Titanite, Zircon

Compound Content

Al, Fe, Potassium Oxide

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, Regional Metamorphism

Cataclastic Metamorphism, Impact Metamorphism, Regional Metamorphism

Weathering

✔ ✘

Types of Weathering

Biological Weathering, Chemical Weathering, Mechanical Weathering

Erosion

✔ ✘

Types of Erosion

Coastal Erosion, Water Erosion

Chemical Erosion

Properties

Physical Properties

Hardness

6-76-7

1 7

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Grain Size

Medium Grained

Medium to Fine Coarse Grained

Fracture

Pervasive

Streak

Bluish Black

White

Porosity

Highly Porous

Less Porous

Luster

Dull

Subvitreous to Dull

Compressive Strength

92.40 N/mm²310.00 N/mm²

0.15 450

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Cleavage

Toughness

Specific Gravity

2.382.8-3

0 8.4

👆🏻

Transparency

Opaque

Density

-9999 g/cm³2.9-2.91 g/cm³

0 1400

👆🏻

Thermal Properties

Specific Heat Capacity

0.79 kJ/Kg K0.92 kJ/Kg K

0.14 3.2

👆🏻

Resistance

Heat Resistant, Impact Resistant

Heat Resistant, Impact Resistant, Pressure Resistant

Reserves

Deposits in Eastern Continents

Asia

China

Africa

East Africa

Europe

Italy

Bulgaria, England, Germany, Norway, Romania, Switzerland

Others

Deposits in Western Continents

North America

USA

South America

Argentina, Bolivia, Brazil, Chile, Colombia, Ecuador, Peru

Deposits in Oceania Continent

Australia

Queensland

New South Wales, New Zealand, Queensland, South Australia, Western Australia

All about Comendite and Larvikite Properties

Know all about Comendite and Larvikite properties here. All properties of rocks are important as they define the type of rock and its application. Comendite and Larvikite belong to Igneous Rocks.Texture of Comendite is Porphyritic whereas that of Larvikite is Phaneritic. Comendite appears Foliated and Larvikite appears Shiny. The luster of Comendite is dull while that of Larvikite is subvitreous to dull. Comendite is available in blue, bluish - grey colors whereas Larvikite is available in black, brown, light to dark grey, white colors. The commercial uses of Comendite are cemetery markers and that of Larvikite are cemetery markers, commemorative tablets, creating artwork.