Definition
Gabbro is an intrusive igneous rock which is chemically equivalent to plutonic Basalt
History
Origin
Germany
Discoverer
Christian Leopold von Buch
Etymology
From Latin glaber bare, smooth, bald
Class
Igneous Rocks
Sub-Class
Durable Rock, Hard Rock
Family
Group
Plutonic
Other Categories
Coarse Grained Rock, Opaque Rock
Texture
Phaneritic
Color
Dark Grey to Black
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
Veined and Shiny
Architecture
Interior Uses
Countertops, Decorative Aggregates, Homes, Interior Decoration
Exterior Uses
As Building Stone, As Facing Stone, Garden Decoration, Office Buildings, Paving Stone
Other Architectural Uses
Curbing
Industry
Construction Industry
As Dimension Stone, Building houses or walls, Cement Manufacture, Construction Aggregate, for Road Aggregate
Medical Industry
-
Antiquity Uses
Artifacts, Monuments, Sculpture
Other Uses
Commercial Uses
Cemetery Markers, Commemorative Tablets, Laboratory bench tops, Jewelry, Sea Defence, Tombstones
Types
Anorthosite Gabbro and Norite Gabbro
Features
Smooth to touch
Archaeological Significance
Monuments
-
Famous Monuments
-
Sculpture
-
Famous Sculptures
-
Pictographs
-
Petroglyphs
-
Figurines
-
Fossils
Absent
Formation
Gabbro, a mafic rock, forms due to cooling and crystallization of magma underneath Earth's surface.
Composition
Mineral Content
Augite, Olivine, Plagioclase, Pyroxene
Compound Content
Aluminium Oxide, CaO, Chromium(III) Oxide, Iron(III) Oxide, Potassium Oxide, MgO, Sodium Oxide, Silicon Dioxide, Sulfur Trioxide
Transformation
Metamorphism
✔
✘
97% - Igneous Rocks Rocks have it !
Types of Metamorphism
Impact Metamorphism
Weathering
✔
✘
99% - Igneous Rocks Rocks have it !
Types of Weathering
Chemical Weathering
Erosion
✔
✘
92% - Igneous Rocks Rocks have it !
Types of Erosion
Coastal Erosion
Physical Properties
Hardness
7
1
7
👆🏻
Grain Size
Coarse Grained
Fracture
Conchoidal
Streak
Black
Porosity
Highly Porous
Luster
-
Compressive Strength
225.00 N/mm2
Rank: 8 (Overall)
0.15
450
👆🏻
Cleavage
-
Toughness
1.6
Specific Gravity
2.86-2.87
0
8.4
👆🏻
Transparency
Opaque
Density
2.7-3.3 g/cm3
0
1400
👆🏻
Thermal Properties
Specific Heat Capacity
0.71 kJ/Kg K
Rank: 23 (Overall)
0.14
3.2
👆🏻
Resistance
Impact Resistant, Pressure Resistant, Wear Resistant
Deposits in Eastern Continents
Asia
India, Russia
Africa
South Africa
Europe
Germany, Greece, Italy, Scotland, Turkey
Others
Greenland
Deposits in Western Continents
North America
Canada, USA
South America
Brazil, Colombia, Venezuela
Deposits in Oceania Continent
Australia
New Zealand, Queensland