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Home Education Science & Nature Science

Geology: Facts about Minerals and How They Form

The Invaluable Significance of Minerals in Diverse Industries

HilaryG by HilaryG
2 years ago
in Science
Reading Time: 6 mins read
A A
Rocks & Minerals from Peru. Photo by Miguel Vera. Flickr.

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

Table of Contents

Toggle
  • The difference between minerals and rocks
    • Rocks: Formed from Fused Minerals Over Time
    • Minerals: Chemical Compounds with Unique Structures and Properties
    • The Fascinating World of Crystals
    • Unveiling the Secrets of Mineral Properties
  • 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.

 

Rocks: Formed from Fused Minerals Over Time

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.

 

Minerals: Chemical Compounds with Unique Structures and Properties

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.

They 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.

 

The Fascinating World of Crystals

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.

 

Unveiling the Secrets of Mineral Properties

Geologists examine the physical properties of minerals such as color, hardness, density, cleavage (the way they break), and luster (how they reflect light), amongst others. Understanding these properties is crucial for various scientific and industrial applications involving minerals.

 

Mineral deposits make colors around hot pool in Yellowstone Park Wyoming. Photo by Tim Pearce. Flickr.
Mineral deposits make colors around hot pool in Yellowstone Park Wyoming. Photo by Tim Pearce. Flickr.

 

How do minerals form?

One way they 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.

They 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. Throughout history to the present day, various industries, including construction, manufacturing, and technology, have utilized minerals.

Their value stems not only from their monetary worth but also from their unique properties and applications. Their scarcity is one of the most significant factors contributing to their value. Certain minerals are rare, found only in specific regions worldwide, making them highly sought after.

 

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

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

Rare earth elements, like neodymium and lithium, crucially contribute to these technological advancements by being integral 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 how they formed in the Earth’s crust.

One common way to classify geological minerals is by their chemical composition. We can group them into different classes based on the elements that compose their chemical structure.

 

Gachala emerald. Minerals and gems come from nature. 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 its crystal structure.

Each mineral’s crystal structure depends on the arrangement of its atoms. 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, they 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: Rare earth elements
HilaryG

HilaryG

I am British retired former lecturer who loves reading, writing and helping my local community. I support the THX News project and it's community of fellow volunteers. It is a amazing place to work and I am learning so much about new technology.

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