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Home Education Science

Geology: Fascinating Facts about Minerals and How They Form

HilaryG by HilaryG
1 month ago
in Science, Uncategorized
Reading Time: 4 mins read
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Rocks & Minerals from Peru. Photo by Miguel Vera. Flickr.

Rocks & Minerals from Peru. Photo by Miguel Vera. Flickr.

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Table of Contents

  • The difference between minerals and rocks
  • How do minerals form?
  • Are minerals valuable?
  • How are minerals classified?
  • Conclusion

 

The difference between minerals and rocks

Minerals and rocks are integral components of the earth’s crust, but many people confuse them as one and the same. While both minerals and rocks share a close relationship, they are fundamentally different in their composition and characteristics.

At their core, rocks are made up of various minerals that have fused together through geological processes over time. Rocks can be classified into three broad categories based on their origin: igneous, sedimentary, and metamorphic.

Igneous rocks form from the cooling of molten magma or lava; sedimentary rocks result from mineral deposits that settle over time; whereas metamorphic rocks arise when intense heat and pressure cause changes in existing rock formations.

In contrast to rocks, minerals are naturally occurring chemical compounds with a definite chemical composition and crystalline structure. They originate from geological processes such as volcanic eruptions, precipitation from water solutions or evaporation of lake waters.

Minerals are the building blocks of life and the foundation of many geological processes. Crystals, in particular, have been studied for centuries due to their unique structures and properties.

In this article, we will explore the geology of minerals, with a special focus on crystals. We will examine how they form and what makes them different from other geological materials.

Additionally, we will discuss some of the practical applications of minerals and crystals in modern life.

Crystals are naturally occurring solids with a definite geometric shape and a repeating pattern in their arrangement of atoms or molecules. They can be found in rocks, soils, and even living organisms such as bones and teeth.

The study of crystals has led to significant breakthroughs in fields such as medicine, electronics, and materials science.

Geologists examine the physical properties of minerals such as color, hardness, density, cleavage (the way they break), luster (how they reflect light), amongst others.

 

How do minerals form?

One way minerals are formed is through the cooling and solidification of magma or lava. When molten rock cools and solidifies, it can form crystals of different minerals depending on the temperature, pressure, and composition of the magma.

Another way minerals are formed is through precipitation from water solutions. Dissolved elements in water can bond together to form new crystal structures over time.

Minerals can also be formed through metamorphism, which occurs when existing rocks are subjected to high temperatures and pressures deep within the Earth’s crust. This causes them to undergo chemical changes and transform into different minerals.

 

Auriferous, uraninitic, hydrocarbon-rich stromatolite rock. Carbon Leader Gold Ore. Blyvooruitzicht Gold Mine, South Africa. Photo by James St. John. Flickr.
Auriferous, uraninitic, hydrocarbon-rich stromatolite rock. Carbon Leader Gold Ore. Blyvooruitzicht Gold Mine, South Africa. Photo by James St. John. Flickr.

 

Are minerals valuable?

Minerals have been a valuable resource for centuries. From ancient times to the present day, minerals have been used in various industries such as construction, manufacturing, and technology. The value of minerals is not only measured in terms of their monetary worth but also by their unique properties and applications.

One of the most significant aspects that make minerals valuable is their scarcity. Some minerals are rare and can only be found in specific regions around the world, making them highly sought after.

 

Octahedral diamond found in Sierra Leone, Africa. Photo by James St. John. Flickr.
Octahedral diamond found in Sierra Leone, Africa. Photo by James St. John. Flickr.

 

Minerals like gold and diamonds hold intrinsic value due to their beauty and durability, while others like copper and iron are essential building blocks for infrastructure projects.

Minerals also play a crucial role in modern technology, including smartphones, electric cars, solar panels, among others.

These technological advancements rely heavily on rare earth elements such as neodymium and lithium that are used in battery production for electric vehicles.

 

Rock salt, halitite. Holocene seafloor of the Dead Sea in Israel. Photo by James St. John. Flickr.
Rock salt, halitite. Holocene seafloor of the Dead Sea in Israel. Photo by James St. John. Flickr.

 

How are minerals classified?

Geological minerals are classified based on a variety of factors, including their chemical composition, crystal structure, and physical properties. This classification system helps scientists better understand the nature of these minerals and how they form in the Earth’s crust.

One common way to classify geological minerals is by their chemical composition. Minerals can be grouped into different classes based on the elements that make up their chemical structure.

 

Gachala emerald. Photo by greyloch. Flickr.
Gachala emerald. Photo by greyloch. Flickr.

 

For example, silicate minerals contain silicon and oxygen, while carbonates contain carbon and oxygen. Other classes include sulfides, halides, oxides, and native elements.

Another important factor in mineral classification is their crystal structure. Each mineral has a crystal structure which depends on how their atoms are arranged. Some common crystal structures include cubic, tetragonal, orthorhombic, monoclinic, triclinic and hexagonal.

 

Conclusion

The geology of minerals plays an integral role in our lives. It shapes the environment we inhabit, provides us with many of the resources that fuel our economies, and has provided us with insights into the history of our planet.

From their uses in everyday applications to their application in scientific research, minerals are essential to humanity’s success.

To ensure that future generations can continue to benefit from these valuable resources, it is important to understand the principles behind mineral geology.

 

Sources: THX News & Wikipedia.

Tags: Facts about MineralsMineralsRocks
HilaryG

HilaryG

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