Tephrite

Travertine

Tephrite and Travertine

Tephrite

Travertine

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Definition

Tephrite is an aphanitic to porphyritic textured, volcanic igneous rock

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

History

Origin

Germany

Italy

Discoverer

Van Tooren

Marcus Vitruvius Pollio

Etymology

From Greek tephra, ashes from Indo-European base, to burn

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

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

Fine Grained Rock, Opaque Rock

Texture

Aphanitic to Porphyritic

Banded

Color

Black, Brown, Green, Grey, White

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

Maintenance

Less

Durability

Durable

Water Resistant

✔ ✘

Scratch Resistant

✔ ✘

Stain Resistant

✔ ✘

Wind Resistant

✔ ✘

Acid Resistant

✔ ✘

Appearance

Vesicular

Fibrous

Uses

Architecture

Interior Uses

Decorative Aggregates, Flooring, Homes, Interior Decoration

Decorative Aggregates, Entryways, Flooring, Homes, Interior Decoration

Exterior Uses

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

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

Other Architectural Uses

Curbing

Industry

Construction Industry

Landscaping

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, Sculpture

Artifacts, Jewellery, Monuments, Sculpture, Small Figurines

Other Uses

Commercial Uses

Production of Lime, Soil Conditioner

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

Types

Igneous rock

Thermal Travertine and Tufa

Features

Host Rock for Lead

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

Tephrite 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.

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

Alkali feldspar, Nepheline, Plagioclase, Pyroxene

Calcite, Clay, Feldspar, Micas, Quartz

Compound Content

CaO, Carbon Dioxide, MgO, Silicon Dioxide

Ca, NaCl, CaO, Oxygen

Transformation

Metamorphism

✔ ✘

Types of Metamorphism

Cataclastic Metamorphism, Contact Metamorphism, Impact Metamorphism, Regional 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

Chemical Erosion, Coastal Erosion, Glacier Erosion

Properties

Physical Properties

Hardness

6.53-4

1 7

👆🏻

Grain Size

Medium to Fine Coarse Grained

Fine Grained

Fracture

Uneven

Splintery

Streak

Bluish Black

White

Porosity

Very Less Porous

Highly Porous

Luster

Subvitreous to Dull

Dull to Pearly

Compressive Strength

90.00 N/mm²80.00 N/mm²

0.15 450

👆🏻

Cleavage

Crenulation and Pervasive

Toughness

2.4

Specific Gravity

2.861.68

0 8.4

👆🏻

Transparency

Opaque

Density

2.8-2.9 g/cm³2.71 g/cm³

0 1400

👆🏻

Thermal Properties

Specific Heat Capacity

0.92 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, Russia

Africa

Namibia, Uganda

Europe

Germany, Hungary, Italy, Portugal, Spain

Austria, Italy, Portugal, United Kingdom

Others

Deposits in Western Continents

North America

USA

Canada, USA

South America

Argentina, Bolivia, Ecuador

Deposits in Oceania Continent

Australia

New Zealand, Western Australia

All about Tephrite and Travertine Properties

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