Home
Compare Rocks


Granophyre and Variolite


Variolite and Granophyre


Definition

Definition
Granophyre is a type of granitic rock which consists of intergrown feldspar and quartz crystals in a medium to fine grained groundmass  
Variolites are a group of dark green basic igneous rocks which exhibit pale colored spots, or spherules, especially on weathered surfaces, that give them a pockmarked appearance  

History
  
  

Origin
-  
France  

Discoverer
Unknown  
Unknown  

Etymology
From German Granophyr, from Granit granite + Porphyr  
From Latin varius, speckled, variegated  

Class
Igneous Rocks  
Igneous Rocks  

Sub-Class
Durable Rock, Hard Rock  
Durable Rock, Hard Rock  

Family
  
  

Group
Volcanic  
Volcanic  

Other Categories
Coarse Grained Rock, Fine Grained Rock, Medium Grained Rock, Opaque Rock  
Opaque Rock  

Texture

Texture
Granophyric  
Glassy, Massive, Porphyritic, Scoriaceous, Vesicular  

Color
Black, Grey, Orange, Pink, White  
Black, Brown, Light to Dark Grey  

Maintenance
More  
Less  

Durability
Durable  
Durable  

Water Resistant
Yes  
Yes  

Scratch Resistant
Yes  
Yes  

Stain Resistant
Yes  
No  

Wind Resistant
Yes  
No  

Acid Resistant
No  
Yes  

Appearance
Veined or Pebbled  
Dull and Soft  

Uses

Architecture
  
  

Interior Uses
Bathrooms, Countertops, Decorative Aggregates, Entryways, Floor Tiles, Flooring, Homes, Hotels, Interior Decoration, Kitchens, Stair Treads  
Floor Tiles, Flooring, Homes, Hotels, Kitchens  

Exterior Uses
As Building Stone, As Facing Stone, Bridges, Garden Decoration, Office Buildings, Paving Stone  
Garden Decoration, Office Buildings  

Other Architectural Uses
-  
Curbing  

Industry
  
  

Construction Industry
As Dimension Stone  
As Dimension Stone, Cobblestones, Rail Track Ballast, Roadstone  

Medical Industry
-  
-  

Antiquity Uses
Artifacts, Monuments, Sculpture, Small Figurines  
Artifacts, Monuments, Sculpture  

Other Uses
  
  

Commercial Uses
Curling, Gemstone, Laboratory bench tops, Tombstones  
Cemetery Markers, Creating Artwork  

Types

Types
Intermediate intrusive rock  
Metamorphic rock  

Features
Available in Lots of Colors and Patterns, It is One of the Oldest, Strongest and Hardest Rock  
Has High structural resistance against erosion and climate, Very fine grained rock  

Archaeological Significance
  
  

Monuments
-  
-  

Famous Monuments
-  
-  

Sculpture
-  
-  

Famous Sculptures
-  
-  

Pictographs
-  
-  

Petroglyphs
-  
-  

Figurines
-  
-  

Fossils
Absent  
Absent  

Formation

Formation
Granophyre is a fine-grained, hard rock which is a type of metasomatite, essentially altered basalt. It forms with or without crystallization, either below the surface as intrusive rocks or on the surface as extrusive rocks.  
Variolites are a group of dark green basic igneous rocks that exhibit pale colored spots on weathered surfaces that give them a pockmarked appearance.  

Composition
  
  

Mineral Content
Hornblade, Orthoclase, Plagioclase, Quartz  
Olivine, Plagioclase, Pyroxene  

Compound Content
Aluminium Oxide, CaO, Iron(III) Oxide, FeO, Potassium Oxide, MgO, MnO, Sodium Oxide, Phosphorus Pentoxide, Silicon Dioxide, Titanium Dioxide  
Aluminium Oxide, CaO, Iron(III) Oxide, FeO, Potassium Oxide, MgO, MnO, Sodium Oxide, Phosphorus Pentoxide, Silicon Dioxide, Titanium Dioxide  

Transformation
  
  

Metamorphism
Yes  
Yes  

Types of Metamorphism
Burial Metamorphism, Impact Metamorphism  
Burial Metamorphism, Cataclastic Metamorphism, Contact Metamorphism, Hydrothermal Metamorphism, Impact Metamorphism, Regional Metamorphism  

Weathering
Yes  
Yes  

Types of Weathering
Biological Weathering  
Biological Weathering, Chemical Weathering, Mechanical Weathering  

Erosion
Yes  
No  

Types of Erosion
Glacier Erosion, Sea Erosion, Wind Erosion  
-  

Properties

Physical Properties
  
  

Hardness
6-7  
6  

Grain Size
Medium to Fine Coarse Grained  
-  

Fracture
-  
Conchoidal  

Streak
White  
White to Grey  

Porosity
Less Porous  
Less Porous  

Luster
Dull to Grainy with Sporadic parts Pearly and Vitreous  
-  

Compressive Strength
175.00 N/mm2  
20
37.50 N/mm2  
99+

Cleavage
-  
-  

Toughness
-  
2.3  

Specific Gravity
2.6-2.7  
2.8-3  

Transparency
Opaque  
Opaque  

Density
2.6-2.8 g/cm3  
2.9-3.1 g/cm3  

Thermal Properties
  
  

Specific Heat Capacity
0.79 kJ/Kg K  
17
0.84 kJ/Kg K  
15

Resistance
Heat Resistant, Wear Resistant  
Heat Resistant, Pressure Resistant, Wear Resistant  

Reserves

Deposits in Eastern Continents
  
  

Asia
China, India, Iran, Saudi Arabia, Sri Lanka, Taiwan, Thailand, Turkey, Vietnam  
India, Russia  

Africa
Angola, Egypt, Madagascar, Namibia, Nigeria, South Africa  
South Africa  

Europe
Austria, Belgium, Finland, France, Germany, Italy, Norway, Sardinia, Spain, Switzerland, The Czech Republic  
Iceland  

Others
-  
-  

Deposits in Western Continents
  
  

North America
Canada, USA  
Canada, USA  

South America
-  
Brazil  

Deposits in Oceania Continent
  
  

Australia
-  
-  

Summary >>
<< Reserves

All about Granophyre and Variolite Properties

Know all about Granophyre and Variolite properties here. All properties of rocks are important as they define the type of rock and its application. Granophyre and Variolite belong to Igneous Rocks.Texture of Granophyre is Granophyric whereas that of Variolite is Glassy, Massive, Porphyritic, Scoriaceous, Vesicular. Granophyre appears Veined or Pebbled and Variolite appears Dull and Soft. The luster of Granophyre is dull to grainy with sporadic parts pearly and vitreous while that of Variolite is . Granophyre is available in black, grey, orange, pink, white colors whereas Variolite is available in black, brown, light to dark grey colors. The commercial uses of Granophyre are curling, gemstone, laboratory bench tops, tombstones and that of Variolite are cemetery markers, creating artwork.

Compare Igneous Rocks

Igneous Rocks

Igneous Rocks

» More Igneous Rocks

Compare Igneous Rocks

» More Compare Igneous Rocks