Definition
Comendite is a hard, peralkaline igneous rock, a type of light blue grey rhyolite
History
Origin
Italy
Discoverer
Unknown
Etymology
Comendite derives its name from the area of Le Commende on San Pietro Island in Italy
Class
Igneous Rocks
Sub-Class
Durable Rock, Hard Rock
Family
Group
Volcanic
Other Categories
Medium Grained Rock, Opaque Rock
Texture
Porphyritic
Color
Blue, Bluish - Grey
Maintenance
Less
Durability
Durable
Water Resistant
✔
✘
81% - Igneous Rocks Rocks have it !
Scratch Resistant
✔
✘
86% - Igneous Rocks Rocks have it !
Stain Resistant
✔
✘
66% - Igneous Rocks Rocks have it !
Wind Resistant
✔
✘
49% - Igneous Rocks Rocks have it !
Acid Resistant
✔
✘
48% - Igneous Rocks Rocks have it !
Appearance
Foliated
Architecture
Interior Uses
Countertops, Decorative Aggregates, Interior Decoration
Exterior Uses
As Building Stone, As Facing Stone, Garden Decoration
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
Medical Industry
-
Antiquity Uses
Artifacts
Other Uses
Commercial Uses
Cemetery Markers
Types
Rhyolite
Features
Very fine grained rock, It is One of the Oldest, Strongest and Hardest Rock
Archaeological Significance
Monuments
-
Famous Monuments
-
Sculpture
-
Famous Sculptures
-
Pictographs
-
Petroglyphs
-
Figurines
-
Fossils
Absent
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.
Composition
Mineral Content
Albite, Amphibole, Quartz
Compound Content
Al, Fe, Potassium Oxide
Transformation
Metamorphism
✔
✘
97% - Igneous Rocks Rocks have it !
Types of Metamorphism
Cataclastic Metamorphism, Regional Metamorphism
Weathering
✔
✘
99% - Igneous Rocks Rocks have it !
Types of Weathering
Biological Weathering, Chemical Weathering, Mechanical Weathering
Erosion
✔
✘
92% - Igneous Rocks Rocks have it !
Types of Erosion
Coastal Erosion, Water Erosion
Physical Properties
Hardness
6-7
1
7
👆🏻
Grain Size
Medium Grained
Fracture
Pervasive
Streak
Bluish Black
Porosity
Highly Porous
Luster
Dull
Compressive Strength
92.40 N/mm2
Rank: 31 (Overall)
0.15
450
👆🏻
Cleavage
-
Toughness
2
Specific Gravity
2.38
0
8.4
👆🏻
Transparency
Opaque
Density
-9999 g/cm3
0
1400
👆🏻
Thermal Properties
Specific Heat Capacity
0.79 kJ/Kg K
Rank: 17 (Overall)
0.14
3.2
👆🏻
Resistance
Heat Resistant, Impact Resistant
Deposits in Eastern Continents
Asia
China
Africa
East Africa
Europe
Italy
Others
-
Deposits in Western Continents
North America
-
South America
-
Deposits in Oceania Continent
Australia
Queensland