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
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
Group
Volcanic
Not Applicable
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
Durability
Durable
Durable
Scratch Resistant
Yes
Yes
Appearance
Foliated
Fibrous
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
Curbing
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
Not Yet Used
Not Yet Used
Antiquity Uses
Artifacts
Artifacts, Jewellery, Monuments, Sculpture, Small Figurines
Commercial Uses
Cemetery Markers
Cemetery Markers, Creating Artwork, Gemstone, Jewelry, Paper Industry, Pottery
Types
Rhyolite
Not Available
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
Not Yet Used
Used
Famous Monuments
Not Applicable
Colosseum in Rome, Italy, Sacré Coeur in Paris, France, Trevi Fountain in Rome, Italy
Sculpture
Not Yet Used
Used
Famous Sculptures
Not Applicable
Data Not Available
Pictographs
Not Used
Used
Petroglyphs
Not Used
Used
Figurines
Not Yet Used
Used
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.
Mineral Content
Albite, Amphibole, Quartz
Calcite, Clay, Feldspar, Micas, Quartz
Compound Content
Al, Fe, Potassium Oxide
Ca, NaCl, CaO, Oxygen
Types of Metamorphism
Cataclastic Metamorphism, Regional Metamorphism
Not Applicable
Types of Weathering
Biological Weathering, Chemical Weathering, Mechanical Weathering
Biological Weathering, Chemical Weathering, Mechanical Weathering
Types of Erosion
Coastal Erosion, Water Erosion
Chemical Erosion, Coastal Erosion, Glacier Erosion
Grain Size
Medium Grained
Fine Grained
Fracture
Pervasive
Splintery
Streak
Bluish Black
White
Porosity
Highly Porous
Highly Porous
Luster
Dull
Dull to Pearly
Cleavage
Not Available
Non-Existent
Specific Gravity
2.38
1.68
Transparency
Opaque
Opaque
Density
Not Available
2.71 g/cm3
Specific Heat Capacity
Not Available
Resistance
Heat Resistant, Impact Resistant
Impact Resistant, Pressure Resistant, Wear Resistant
Deposits in Eastern Continents
Africa
East Africa
Not Yet Found
Europe
Italy
Austria, Italy, Portugal, United Kingdom
Others
Not Yet Found
Not Yet Found
Deposits in Western Continents
North America
Not Yet Found
Canada, USA
South America
Not Yet Found
Argentina, Bolivia, Ecuador
Deposits in Oceania Continent
Australia
Queensland
Not Yet Found
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.