49 Diorite Facts For Kids: Uses, Composition, Properties, And More

Shubhra Shukla
Oct 25, 2022 By Shubhra Shukla
Originally Published on Apr 17, 2022
Edited by Daisha Capers
Fact-checked by Amatullah Gulbargawala
Read some amazing diorite facts here. Find out about the uses, composition, properties, and more.


Diorite is a coarse-grained igneous rock similar to granitic rock.

It is composed mostly of the minerals plagioclase, biotite, and the pyroxene group of minerals. It is mostly white or gray to black.

It is found in continental rift zones and forms large batholiths. There are important uses of diorite rocks such as in building, road paving, concrete, and other construction uses. Read more interesting diorite facts here.

Facts About Diorite Rock

It is an intrusive igneous dioritic rock. Read more facts about this rock type quartz diorite here-

It has a medium to dark gray color with many mafic minerals.

Feldspar and pyroxene are two minerals that are the main components of diorite.

It is a coarse-grain size rock with a hardness of about 7.5 on the Mohs scale of mineral hardness

It's a dark-colored rock with numerous mafic crystals, generally medium to dark gray.

Often confused with gabbro, diorite is a coarse-grained, intrusive and rare rock that is similar to granite.

Diorites are igneous rocks that are formed deep within the Earth's surface. This type of igneous rock is formed by the cooling magma that never made it to the surface.

It appears as quite little intrusions often associated with larger intrusions like granite. Diorite forms large crystals by slow cooling.

Diorite is a coarse-grained plutonic rock that contains around 20% quartz and feldspar.

Magma that is rich in silica and light-colored minerals forms granite.

It is rarely used as an ornamental and building material.

Diorite is one of the dark gray stones that is sold commercially as black granite.

Diorite has an intermediate composition between granite and gabbro.

Diorite does not have significant quartz as a constituent mineral, but it may contain small amounts of quartz as an impurity.

Uses Of Diorite Rock

It is hard, yet easy to work with and its durability makes it ideal for a variety of applications. Some of its uses are listed below.

Used for countertops and flooring, as well as for exterior building features. The construction industry has been using diorite as its base material for centuries.

Diorite, a type of granite is known for its dark gray color and greenish cast. It has micro-sized cracks that give it an interesting texture in roughcast finishes, making this aggregate perfect to use on walls, pathways, or walkways near pools due to their small size of 0.07-0.23 in (2-6 mm).

An aggregate of small pieces measuring between 0.15 in (4 mm) and 0.39 in (10 mm) are used as decorative stones.

This product can be used on or near any hard-lying areas in your landscape such as walks, driveways, and patios.

0.4-0.8 in (10-2o mm) size diorite aggregate can be used in gardens to create the authentic Japanese style.

0.4-2.4 in (10-63 mm) size diorite is a great option for creating a sub-base in the permeable drainage stone system, public spaces, and parking lots.

Diorite is an amazing, durable stone, that can take on any finish or texture you throw at it.

Cutting diorite can be used to create any size and shape of the dimension stone-like tiles, slabs, or stones that are usually found in quarries.

The use of diorite stones may be found in both the interior and external areas of structures.

Diorite is the perfect stone for outdoor applications, including exclusive designer patio designs.

You can create a walking path in your landscape with this rock. Their quick growth and ability to fill cracks make them perfect for paths that have basalt borders.

They're a great way to add appeal and beautify your facade.

Diorite stone slabs are a perfect choice for outdoor utilities like sitting benches and tables, as well as seats on top of retaining walls.

The durability and natural beauty of diorite stone make it an excellent interior application for flooring, wall cladding, or even a reception desk.

Diorites make for great kitchen countertops and tabletops, as well.

Apart from these, a large diorite cabochon, 'pink marshmallow stone' in Australia, is loaded with pink quartz crystals for a stunning display of color.

There are many artistic uses of diorites in decoration, sculpture, and outdoor features.

Diorites have been used in the pottery and decoration industry for centuries.

Diorites are important minerals for sculptors because they have been used to create some of the world's most famous pieces.

Diorites are also used in the gemstone industry.

Diorite Rock's Properties

Diorite has some unique properties when compared to other rocks like:

Diorite has a bluish-grey streak. Diorite has an amazing shiny luster.

Diorite forms at a temperature of 1472-1832 degrees F (800- 1000 degrees C)

Considering porosity, diorite is less porous compared to other rocks.

Physical properties of diorite include its hardness being four to seven.

The coarse grain size of this rock is medium to rough.

The toughness level of diorite is 2.1.

The specific gravity of diorite is around 2.8 to 3.

It is resistant to heat, wear and tears, and pressure. It is durable against wetness, scratches, stains, breezes, and it is acid-resistant.

It comes in black, brown, light to dark gray, and white colors.

Composition Of Diorite Rock

Diorite has some sodium in it, which comes from the plagioclase content. Read more about its composition.

It contains minerals such as hornblende, biotite, and pyroxene.

Diorite is one of the types of igneous rocks with traces found in other minerals like quartz and feldspar. The presence of these substances gives it an interesting contrasting black-and-white appearance.

The more quartz in it, the harder and less pliable this rock will be.

Diorite has a corresponding variety that is known as foidite.

Foidite has a more calcic plagioclase feldspar than diorite.

Foidite is more fine-grained than gemstones.

Varieties of diorite that are deficient in hornblende and other dark minerals are known as leucodiorite.

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Written by Shubhra Shukla

Bachelor of Technology specializing in Computer Science

Shubhra Shukla picture

Shubhra ShuklaBachelor of Technology specializing in Computer Science

With experience in digital marketing, social media strategy, and creative copywriting, Shubhra is a skilled writer and editor at Kidadl. She holds a Bachelor's degree in Computer Science Engineering from Gujarat Technological University/Narnarayan Shastri Institute of Technology (N.S.I.T) and believes in the power of words to influence people. When not working, she enjoys spending time with family and friends.

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Fact-checked by Amatullah Gulbargawala

Bachelor of Arts specializing in English, Bachelor of Education specializing in the Language Arts

Amatullah Gulbargawala picture

Amatullah GulbargawalaBachelor of Arts specializing in English, Bachelor of Education specializing in the Language Arts

Amatullah is a passionate student pursuing a Bachelor of Arts and Bachelor of Education from Ashoka College of Education. With a keen interest in literature, she has excelled in elocution competitions and is an accomplished writer. She has completed courses like "History of English Language and Literature", "Introduction to Western Political Thought and Theory", and "Development of Soft Skills and Personality". In her free time, Amatullah enjoys reading books and writing poetry.

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