Definition
Comendite is a hard, peralkaline igneous rock, a type of light blue grey rhyolite
Jadeitite is a metamorphic rock usually found in blueschist grade metamorphic terrains
Discoverer
Unknown
Unknown
Etymology
Comendite derives its name from the area of Le Commende on San Pietro Island in Italy
From pyroxene mineral jadeite
Class
Igneous Rocks
Metamorphic 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
Earthy
Color
Blue, Bluish - Grey
Black, Brown, Colourless, Green, Grey, White
Durability
Durable
Durable
Appearance
Foliated
Rough and Dull
Interior Uses
Countertops, Decorative Aggregates, Interior Decoration
Decorative Aggregates, Homes, Interior Decoration
Exterior Uses
As Building Stone, As Facing Stone, Garden Decoration
Garden Decoration, Office Buildings, Paving Stone
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, Cutting Tool, Knives
Medical Industry
Not Yet Used
Not Yet Used
Antiquity Uses
Artifacts
Artifacts, Jewellery, Monuments, Sculpture
Commercial Uses
Cemetery Markers
Commemorative Tablets, Creating Artwork, Jewelry
Types
Rhyolite
Not Available
Features
Very fine grained rock, It is One of the Oldest, Strongest and Hardest Rock
Host Rock for Lead
Archaeological Significance
Monuments
Not Yet Used
Used
Famous Monuments
Not Applicable
Data Not Available
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.
Due to change in environmental conditions, rocks are heated and pressurized deep inside the Earth's surface. Jadeitite is formed from the extreme heat caused by magma or by the intense collisions and friction of tectonic plates.
Mineral Content
Albite, Amphibole, Quartz
Carbonate, Magnetite, Pyrrhotite, Serpentine, Sulfides
Compound Content
Al, Fe, Potassium Oxide
Ca, CaO, Carbon Dioxide, KCl, MgO, Sulfur Dioxide, Sulphur
Types of Metamorphism
Cataclastic Metamorphism, Regional Metamorphism
Cataclastic Metamorphism, Contact Metamorphism, Regional Metamorphism
Types of Weathering
Biological Weathering, Chemical Weathering, Mechanical Weathering
Not Applicable
Types of Erosion
Coastal Erosion, Water Erosion
Coastal Erosion, Water Erosion, Wind Erosion
Grain Size
Medium Grained
Very fine-grained
Fracture
Pervasive
Uneven
Streak
Bluish Black
White, Greenish White or Grey
Porosity
Highly Porous
Less Porous
Luster
Dull
Waxy and Dull
Cleavage
Not Available
Irregular
Specific Gravity
2.38
2.79-3
Transparency
Opaque
Opaque
Density
Not Available
2.5-3 g/cm3
Specific Heat Capacity
Not Available
Resistance
Heat Resistant, Impact Resistant
Heat Resistant, Water Resistant
Deposits in Eastern Continents
Asia
China
India, Saudi Arabia, Singapore, South Korea
Africa
East Africa
Ethiopia, Western Africa
Europe
Italy
England, Georgia, Switzerland, United Kingdom
Others
Not Yet Found
Not Yet Found
Deposits in Western Continents
North America
Not Yet Found
Canada
South America
Not Yet Found
Colombia
Deposits in Oceania Continent
Australia
Queensland
Central Australia, New South Wales, New Zealand, Western Australia
All about Comendite and Jadeitite Properties
Know all about Comendite and Jadeitite properties here. All properties of rocks are important as they define the type of rock and its application. Comendite belongs to Igneous Rocks while Jadeitite belongs to Metamorphic Rocks.Texture of Comendite is Porphyritic whereas that of Jadeitite is Earthy. Comendite appears Foliated and Jadeitite appears Rough and Dull. The luster of Comendite is dull while that of Jadeitite is waxy and dull. Comendite is available in blue, bluish - grey colors whereas Jadeitite is available in black, brown, colourless, green, grey, white colors. The commercial uses of Comendite are cemetery markers and that of Jadeitite are commemorative tablets, creating artwork, jewelry.