Definition
Scoria is a dark-colored extrusive igneous rock with abundant round bubble-like cavities
  
Aplite is a fine-grained granite composed mainly of feldspar and quartz
  
History
  
  
Origin
Unknown
  
Iran
  
Discoverer
Unknown
  
Unknown
  
Etymology
From late Middle English (denoting slag from molten metal), from Greek skōria refuse, from skōr dung
  
From German Aplit, from Greek haploos simple + -ite
  
Class
Igneous Rocks
  
Igneous Rocks
  
Sub-Class
Durable Rock, Medium Hardness Rock
  
Durable Rock, Hard Rock
  
Family
  
  
Group
Volcanic
  
Plutonic
  
Other Categories
Fine Grained Rock, Opaque Rock
  
Fine Grained Rock, Opaque Rock
  
Texture
Vesicular
  
Granular, Graphic
  
Color
Black, Brown, Dark Grey to Black, Red
  
Black, Grey, Orange, Pink, White
  
Maintenance
More
  
More
  
Durability
Durable
  
Durable
  
Water Resistant
Yes
  
Yes
  
Scratch Resistant
Yes
  
Yes
  
Stain Resistant
No
  
Yes
  
Wind Resistant
No
  
Yes
  
Acid Resistant
No
  
Yes
  
Appearance
Glassy and Vesicular
  
Veined or Pebbled
  
Architecture
  
  
Interior Uses
Decorative Aggregates, Interior Decoration
  
Bathrooms, Countertops, Decorative Aggregates, Entryways, Floor Tiles, Homes, Hotels, Kitchens, Stair Treads
  
Exterior Uses
Garden Decoration, Paving Stone
  
As Building Stone, As Facing Stone, Bridges, Paving Stone, Near Swimming Pools, Office Buildings, Resorts
  
Other Architectural Uses
Curbing
  
Curbing
  
Industry
  
  
Construction Industry
Cement Manufacture, Construction Aggregate, for Road Aggregate, In landscaping and drainage works
  
As Dimension Stone
  
Medical Industry
Not Yet Used
  
Not Yet Used
  
Antiquity Uses
Artifacts, Monuments, Sculpture
  
Artifacts, Monuments, Sculpture, Small Figurines
  
Other Uses
  
  
Commercial Uses
As a traction material on snow-covered roads, Creating Artwork, High-temperature insulation, In gas barbecue grills
  
Curling, Gemstone, Laboratory bench tops, Small Sculptures, Tombstones
  
Types
Not Available
  
Not Available
  
Features
Available in Lots of Colors and Patterns, Generally rough to touch, Surfaces are often shiny
  
Available in lots of colors, Available in Lots of Colors and Patterns, Is one of the oldest rock
  
Archaeological Significance
  
  
Monuments
Used
  
Used
  
Famous Monuments
Data Not Available
  
Data Not Available
  
Sculpture
Used
  
Used
  
Famous Sculptures
Data Not Available
  
Data Not Available
  
Pictographs
Used
  
Not Used
  
Petroglyphs
Used
  
Not Used
  
Figurines
Used
  
Used
  
Fossils
Absent
  
Absent
  
Formation
Scoria forms when magma containing huge amount of dissolved gas flows from a volcano during an eruption.
  
Aplites belong to intrusive igneous rocks which are mostly quart and alkali feldspar and are formed from residual eutectic granitic liquids and represent the final crystallization products of magma.
  
Composition
  
  
Mineral Content
Apatite, Biotite, Calcite, Feldspar, Hematite, Hornblade, Ilmenite, Magnetite, Olivine, Pyroxene, Quartz, Silica
  
Amphibole, Biotite, Feldspar, Hornblade, Micas, Muscovite or Illite, Plagioclase, Pyroxene, Quartz
  
Compound Content
Ca, NaCl
  
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, Cataclastic Metamorphism, Contact Metamorphism
  
Burial Metamorphism, Cataclastic Metamorphism, Hydrothermal Metamorphism, Regional Metamorphism
  
Weathering
Yes
  
Yes
  
Types of Weathering
Biological Weathering, Chemical Weathering, Mechanical Weathering
  
Chemical Weathering, Mechanical Weathering
  
Erosion
Yes
  
Yes
  
Types of Erosion
Chemical Erosion, Coastal Erosion, Glacier Erosion
  
Chemical Erosion, Coastal Erosion, Wind Erosion
  
Physical Properties
  
  
Hardness
5-6
  
6.5
  
Grain Size
Fine Grained
  
Very fine-grained
  
Fracture
Conchoidal
  
Not Available
  
Streak
White
  
White
  
Porosity
Highly Porous
  
Less Porous
  
Luster
Subvitreous to Dull
  
Dull to Pearly to Subvitreous
  
Compressive Strength
Not Available
  
130.00 N/mm
2
  
16
Cleavage
Perfect
  
Not Available
  
Toughness
2.1
  
Not Available
  
Specific Gravity
Not Available
  
2.6
  
Transparency
Opaque
  
Opaque
  
Density
Not Available
  
2.6 g/cm3
  
Thermal Properties
  
  
Specific Heat Capacity
Not Available
  
0.79 kJ/Kg K
  
16
Resistance
Heat Resistant, Impact Resistant, Pressure Resistant, Wear Resistant
  
Heat Resistant, Wear Resistant
  
Deposits in Eastern Continents
  
  
Asia
Afghanistan, Indonesia, Japan, Russia
  
China, India, Iran, Saudi Arabia, Sri Lanka, Taiwan, Thailand, Turkey, Vietnam
  
Africa
Ethiopia, Kenya, Tanzania
  
Angola, Egypt, Madagascar, Namibia, Nigeria, South Africa
  
Europe
Greece, Hungary, Iceland, Italy, Turkey
  
Austria, Belgium, Finland, France, Germany, Italy, Norway, Sardinia, Spain, Switzerland, The Czech Republic, Venezuela
  
Others
Not Yet Found
  
Not Yet Found
  
Deposits in Western Continents
  
  
North America
Bahamas, Barbados, Canada, Costa Rica, Cuba, Jamaica, Mexico, USA
  
Canada, USA
  
South America
Argentina, Chile, Ecuador, Peru
  
Not Yet Found
  
Deposits in Oceania Continent
  
  
Australia
New Zealand, Western Australia
  
Not Yet Found