Comendite

Travertine

Comendite and Travertine

Comendite

Travertine

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Definition

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

Travertine is a mineral consisting of layered calcium carbonate formed by deposition from spring waters

History

Origin

Italy

Discoverer

Unknown

Marcus Vitruvius Pollio

Etymology

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

From Italian travertino a kind of building stone, from Tiburs, adjective from Tibur (Tivoli), in Italy

Class

Igneous Rocks

Sedimentary Rocks

Sub-Class

Durable Rock, Hard Rock

Durable Rock, Medium Hardness Rock

Family

Group

Volcanic

Other Categories

Medium Grained Rock, Opaque Rock

Fine Grained Rock, Opaque Rock

Texture

Porphyritic

Banded

Color

Blue, Bluish - Grey

Beige, Black, Blue, Brown, Grey, Red, White, Yellow

Maintenance

Less

Durability

Durable

Water Resistant

✔ ✘

Scratch Resistant

✔ ✘

Stain Resistant

✔ ✘

Wind Resistant

✔ ✘

Acid Resistant

✔ ✘

Appearance

Foliated

Fibrous

Uses

Architecture

Interior Uses

Countertops, Decorative Aggregates, Interior Decoration

Decorative Aggregates, Entryways, Flooring, Homes, Interior Decoration

Exterior Uses

As Building Stone, As Facing Stone, Garden Decoration

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

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

Medical Industry

Antiquity Uses

Artifacts

Artifacts, Jewellery, Monuments, Sculpture, Small Figurines

Other Uses

Commercial Uses

Cemetery Markers

Cemetery Markers, Creating Artwork, Gemstone, Jewelry, Paper Industry, Pottery

Types

Rhyolite

Thermal Travertine and Tufa

Features

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

Stalactites and stalagmites are formed from this rock, Surfaces are often shiny, Very fine grained rock

Archaeological Significance

Monuments

Famous Monuments

Colosseum in Rome, Italy, Sacré Coeur in Paris, France, Trevi Fountain in Rome, Italy

Sculpture

Famous Sculptures

Pictographs

Petroglyphs

Figurines

Fossils

Absent

Present

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.

Travertine is a type of sedimentary rock formed when a river carries or transports pieces of broken rock which then undergo sedimentation. They are then subjected to high temperature and pressure hence forming travertine rock.

Composition

Mineral Content

Albite, Amphibole, Quartz

Calcite, Clay, Feldspar, Micas, Quartz

Compound Content

Al, Fe, Potassium Oxide

Ca, NaCl, CaO, Oxygen

Transformation

Metamorphism

✔ ✘

Types of Metamorphism

Cataclastic Metamorphism, Regional Metamorphism

Weathering

✔ ✘

Types of Weathering

Biological Weathering, Chemical Weathering, Mechanical Weathering

Erosion

✔ ✘

Types of Erosion

Coastal Erosion, Water Erosion

Chemical Erosion, Coastal Erosion, Glacier Erosion

Properties

Physical Properties

Hardness

6-73-4

1 7

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Grain Size

Medium Grained

Fine Grained

Fracture

Pervasive

Splintery

Streak

Bluish Black

White

Porosity

Highly Porous

Luster

Dull

Dull to Pearly

Compressive Strength

92.40 N/mm²80.00 N/mm²

0.15 450

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Cleavage

Toughness

Specific Gravity

2.381.68

0 8.4

👆🏻

Transparency

Opaque

Density

-9999 g/cm³2.71 g/cm³

0 1400

👆🏻

Thermal Properties

Specific Heat Capacity

0.79 kJ/Kg K1.09 kJ/Kg K

0.14 3.2

👆🏻

Resistance

Heat Resistant, Impact Resistant

Impact Resistant, Pressure Resistant, Wear Resistant

Reserves

Deposits in Eastern Continents

Asia

China

China, Russia

Africa

East Africa

Europe

Italy

Austria, Italy, Portugal, United Kingdom

Others

Deposits in Western Continents

North America

Canada, USA

South America

Argentina, Bolivia, Ecuador

Deposits in Oceania Continent

Australia

Queensland

All about Comendite and Travertine Properties

Know all about Comendite and Travertine properties here. All properties of rocks are important as they define the type of rock and its application. Comendite belongs to Igneous Rocks while Travertine belongs to Sedimentary Rocks.Texture of Comendite is Porphyritic whereas that of Travertine is Banded. Comendite appears Foliated and Travertine appears Fibrous. The luster of Comendite is dull while that of Travertine is dull to pearly. Comendite is available in blue, bluish - grey colors whereas Travertine is available in beige, black, blue, brown, grey, red, white, yellow colors. The commercial uses of Comendite are cemetery markers and that of Travertine are cemetery markers, creating artwork, gemstone, jewelry, paper industry, pottery.