Definition
Comendite is a hard, peralkaline igneous rock, a type of light blue grey rhyolite
During the impact melted material forming a breccia containing glass and crystal or lithic fragments together form Suevite rock.
Origin
Italy
Canada, Germany
Discoverer
Unknown
Unknown
Etymology
Comendite derives its name from the area of Le Commende on San Pietro Island in Italy
No etymologies found
Class
Igneous Rocks
Metamorphic Rocks
Sub-Class
Durable Rock, Hard Rock
Durable Rock, Medium Hardness Rock
Other Categories
Medium Grained Rock, Opaque Rock
Coarse Grained Rock, Opaque Rock
Texture
Porphyritic
Earthy
Color
Blue, Bluish - Grey
Black, Brown, Green, Grey, Pink
Durability
Durable
Durable
Scratch Resistant
Yes
Yes
Appearance
Foliated
Banded
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
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, Cement Manufacture, for Road Aggregate, Making natural cement, Manufacture of Magnesium and Dolomite Refractories
Antiquity Uses
Artifacts
Artifacts, Monuments, Sculpture
Commercial Uses
Cemetery Markers
As a Feed Additive for Livestock, Gemstone, Metallurgical Flux, Source of Magnesia (MgO)
Types
Rhyolite
Phyllosilicates, Calcite
Features
Very fine grained rock, It is One of the Oldest, Strongest and Hardest Rock
Host Rock for Lead
Archaeological Significance
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.
Suevite is a metamorphic rock consisting partly of melted material, typically forming a breccia containing glass and crystal or lithic fragments, formed during an impact event.
Mineral Content
Albite, Amphibole, Quartz
Coesite, Quartz, Stishovite
Compound Content
Al, Fe, Potassium Oxide
CaO, Carbon Dioxide, MgO
Types of Metamorphism
Cataclastic Metamorphism, Regional Metamorphism
Burial Metamorphism, Cataclastic Metamorphism, Contact Metamorphism, Hydrothermal Metamorphism, Impact Metamorphism, Regional Metamorphism
Types of Weathering
Biological Weathering, Chemical Weathering, Mechanical Weathering
-
Types of Erosion
Coastal Erosion, Water Erosion
-
Grain Size
Medium Grained
Coarse Grained
Fracture
Pervasive
Uneven
Streak
Bluish Black
Light to dark brown
Porosity
Highly Porous
Less Porous
Specific Gravity
2.38
2.86
Transparency
Opaque
Opaque
Density
-9999 g/cm3
2.8-2.9 g/cm3
Resistance
Heat Resistant, Impact Resistant
Heat Resistant
Deposits in Eastern Continents
Europe
Italy
England, France, Germany, Great Britain, Netherlands, Sweden, Switzerland, United Kingdom
Deposits in Western Continents
Deposits in Oceania Continent
All about Comendite and Suevite Properties
Know all about Comendite and Suevite properties here. All properties of rocks are important as they define the type of rock and its application. Comendite belongs to Igneous Rocks while Suevite belongs to Metamorphic Rocks.Texture of Comendite is Porphyritic whereas that of Suevite is Earthy. Comendite appears Foliated and Suevite appears Banded. The luster of Comendite is dull while that of Suevite is earthy. Comendite is available in blue, bluish - grey colors whereas Suevite is available in black, brown, green, grey, pink colors. The commercial uses of Comendite are cemetery markers and that of Suevite are as a feed additive for livestock, gemstone, metallurgical flux, source of magnesia (mgo).