Definition
Travertine is a mineral consisting of layered calcium carbonate formed by deposition from spring waters
Comendite is a hard, peralkaline igneous rock, a type of light blue grey rhyolite
Discoverer
Marcus Vitruvius Pollio
Unknown
Etymology
From Italian travertino a kind of building stone, from Tiburs, adjective from Tibur (Tivoli), in Italy
Comendite derives its name from the area of Le Commende on San Pietro Island in Italy
Class
Sedimentary Rocks
Igneous Rocks
Sub-Class
Durable Rock, Medium Hardness Rock
Durable Rock, Hard Rock
Group
Not Applicable
Volcanic
Other Categories
Fine Grained Rock, Opaque Rock
Medium Grained Rock, Opaque Rock
Texture
Banded
Porphyritic
Color
Beige, Black, Blue, Brown, Grey, Red, White, Yellow
Blue, Bluish - Grey
Durability
Durable
Durable
Scratch Resistant
Yes
Yes
Appearance
Fibrous
Foliated
Interior Uses
Decorative Aggregates, Entryways, Flooring, Homes, Interior Decoration
Countertops, Decorative Aggregates, Interior Decoration
Exterior Uses
As Building Stone, As Facing Stone, Paving Stone, Garden Decoration, Office Buildings
As Building Stone, As Facing Stone, Garden Decoration
Other Architectural Uses
Curbing
Curbing
Construction Industry
As Dimension Stone, Building houses or walls, Cement Manufacture, Construction Aggregate, for Road Aggregate, Raw material for the manufacture of mortar
Building houses or walls, Cement Manufacture, Construction Aggregate, for Road Aggregate, Landscaping, Making natural cement, Raw material for the manufacture of mortar
Medical Industry
Not Yet Used
Not Yet Used
Antiquity Uses
Artifacts, Jewellery, Monuments, Sculpture, Small Figurines
Artifacts
Commercial Uses
Cemetery Markers, Creating Artwork, Gemstone, Jewelry, Paper Industry, Pottery
Cemetery Markers
Types
Not Available
Rhyolite
Features
Stalactites and stalagmites are formed from this rock, Surfaces are often shiny, Very fine grained rock
Very fine grained rock, It is One of the Oldest, Strongest and Hardest Rock
Archaeological Significance
Monuments
Used
Not Yet Used
Famous Monuments
Colosseum in Rome, Italy, Sacré Coeur in Paris, France, Trevi Fountain in Rome, Italy
Not Applicable
Sculpture
Used
Not Yet Used
Famous Sculptures
Data Not Available
Not Applicable
Pictographs
Used
Not Used
Petroglyphs
Used
Not Used
Figurines
Used
Not Yet Used
Formation
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.
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.
Mineral Content
Calcite, Clay, Feldspar, Micas, Quartz
Albite, Amphibole, Quartz
Compound Content
Ca, NaCl, CaO, Oxygen
Al, Fe, Potassium Oxide
Types of Metamorphism
Not Applicable
Cataclastic Metamorphism, Regional Metamorphism
Types of Weathering
Biological Weathering, Chemical Weathering, Mechanical Weathering
Biological Weathering, Chemical Weathering, Mechanical Weathering
Types of Erosion
Chemical Erosion, Coastal Erosion, Glacier Erosion
Coastal Erosion, Water Erosion
Grain Size
Fine Grained
Medium Grained
Fracture
Splintery
Pervasive
Streak
White
Bluish Black
Porosity
Highly Porous
Highly Porous
Luster
Dull to Pearly
Dull
Cleavage
Non-Existent
Not Available
Specific Gravity
1.68
2.38
Transparency
Opaque
Opaque
Density
2.71 g/cm3
Not Available
Specific Heat Capacity
Not Available
Resistance
Impact Resistant, Pressure Resistant, Wear Resistant
Heat Resistant, Impact Resistant
Deposits in Eastern Continents
Africa
Not Yet Found
East Africa
Europe
Austria, Italy, Portugal, United Kingdom
Italy
Others
Not Yet Found
Not Yet Found
Deposits in Western Continents
North America
Canada, USA
Not Yet Found
South America
Argentina, Bolivia, Ecuador
Not Yet Found
Deposits in Oceania Continent
Australia
Not Yet Found
Queensland
All about Travertine and Comendite Properties
Know all about Travertine and Comendite properties here. All properties of rocks are important as they define the type of rock and its application. Travertine belongs to Sedimentary Rocks while Comendite belongs to Igneous Rocks.Texture of Travertine is Banded whereas that of Comendite is Porphyritic. Travertine appears Fibrous and Comendite appears Foliated. The luster of Travertine is dull to pearly while that of Comendite is dull. Travertine is available in beige, black, blue, brown, grey, red, white, yellow colors whereas Comendite is available in blue, bluish - grey colors. The commercial uses of Travertine and Comendite are cemetery markers, creating artwork, gemstone, jewelry, paper industry, pottery.