Definition
Origin
Discoverer
Etymology
Class
Sub-Class
Group
Other Categories
Texture
Color
Maintenance
Durability
Water Resistant
Scratch Resistant
Stain Resistant
Wind Resistant
Acid Resistant
Appearance
Interior Uses
Exterior Uses
Other Architectural Uses
Construction Industry
Medical Industry
Antiquity Uses
Commercial Uses
Types
Features
Monuments
Famous Monuments
Sculpture
Famous Sculptures
Pictographs
Petroglyphs
Figurines
Fossils
Formation
Mineral Content
Compound Content
Metamorphism
Types of Metamorphism
Weathering
Types of Weathering
Erosion
Types of Erosion
Hardness
Grain Size
Fracture
Streak
Porosity
Luster
Compressive Strength
Cleavage
Toughness
Specific Gravity
Transparency
Density
Specific Heat Capacity
Resistance
Asia
Africa
Europe
Others
North America
South America
Australia
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
From Latin varius, speckled, variegated
Glassy, Massive, Porphyritic, Scoriaceous, Vesicular
Black, Brown, Light to Dark Grey
Floor Tiles, Flooring, Homes, Hotels, Kitchens
Garden Decoration, Office Buildings
As Dimension Stone, Cobblestones, Rail Track Ballast, Roadstone
Artifacts, Monuments, Sculpture
Cemetery Markers, Creating Artwork
Has High structural resistance against erosion and climate, Very fine grained rock
Variolites are a group of dark green basic igneous rocks that exhibit pale colored spots on weathered surfaces that give them a pockmarked appearance.
Olivine, Plagioclase, Pyroxene
Aluminium Oxide, CaO, Iron(III) Oxide, FeO, Potassium Oxide, MgO, MnO, Sodium Oxide, Phosphorus Pentoxide, Silicon Dioxide, Titanium Dioxide
Burial Metamorphism, Cataclastic Metamorphism, Contact Metamorphism, Hydrothermal Metamorphism, Impact Metamorphism, Regional Metamorphism
Biological Weathering, Chemical Weathering, Mechanical Weathering
Heat Resistant, Pressure Resistant, Wear Resistant
Shale is a fine-grained sedimentary rock which is formed by the compaction of silt and clay-size mineral particles
From German Schalstein laminated limestone, and Schalgebirge layer of stone in stratified rock. From Old English scealu in its base sense of- thing that divides or separate,
Durable Rock, Medium Hardness Rock
Fine Grained Rock, Opaque Rock
Black, Brown, Buff, Green, Grey, Red, Yellow
Decorative Aggregates, Homes, Interior Decoration
As Building Stone, As Facing Stone, Office Buildings
Cement Manufacture, Construction Aggregate, for Road Aggregate, Making natural cement, Raw material for the manufacture of mortar
Creating Artwork, Pottery
Red Shale, Black Shale, Green Shale, Grey Shale and Yellow Shale
Easily splits into thin plates, Generally rough to touch, Very fine grained rock
Shale forms when very fine-grained clay particles are deposited in water which settle at the bottom of water bodies. They are later compacted hence forming shale.
Albite, Biotite, Calcite, Chert, Chlorite, Dolomite, Hematite, Micas, Muscovite or Illite, Pyrite, Quartz, Silica, Sulfides
Ca, Fe, Mg, Silicon Dioxide, Sodium
Biological Weathering, Chemical Weathering, Mechanical Weathering
Chemical Erosion, Coastal Erosion, Glacier Erosion
Heat Resistant, Impact Resistant
Bangladesh, China, India, Russia
Ethiopia, Kenya, Morocco, South Africa, Tanzania
Austria, France, Germany, Greece, Italy, Romania, Scotland, Spain, Switzerland
Bolivia, Chile, Colombia, Ecuador, Peru, Venezuela
New South Wales, New Zealand, Queensland, Victoria, Western Australia