The Story of Diamonds: How Are Natural Diamonds Formed?

The brilliance we see when looking at diamond jewellery is the final stage of an extraordinary journey that began billions of years ago deep within the Earth. Natural diamonds form when carbon atoms crystallise under extreme pressure and temperature. Volcanic activity carries them towards the surface, after which they are mined, examined and cut with great skill into brilliant gemstones.

The story of the diamond is not confined to geology. From ancient civilisations to the present day, this precious stone has been associated with strength, endurance, devotion and eternity. It has appeared in royal treasures, witnessed important historical journeys and gradually become one of the most powerful symbols of love.

How, then, does a natural diamond form? Can coal become diamond, and how is a rough diamond transformed into a sparkling jewel?

What Is a Diamond?

Diamond is a naturally occurring crystalline form of the element carbon. Each carbon atom is joined to surrounding carbon atoms by strong bonds, giving diamond its characteristic hardness.

A pure diamond may be colourless. Trace elements incorporated into the crystal structure, or structural changes that occur during formation, can also make diamonds appear yellow, brown, blue, pink, green or other colours.

Hardness is not the diamond’s only special quality. Its powerful interaction with light creates brilliance, fire and lively sparkle when the stone is cut correctly. These optical properties underpin the unique position of natural diamonds in the world of jewellery.

What Is the Difference Between a Diamond and a Brilliant?

In everyday Turkish, the words *elmas* and *pırlanta* are sometimes used interchangeably, but an important distinction relates to how the stone has been processed.

*Elmas* refers to the mineral itself and to the rough form found in nature. A natural crystal that has not yet been cut or polished is still a diamond.

*Pırlanta* describes a diamond cut and polished to particular proportions in order to enhance its light performance. In Turkish, the word is most often used for a round brilliant-cut diamond.

In other words, every natural brilliant is a diamond, but not every rough diamond recovered from nature has yet become a brilliant-cut gemstone.

How Are Natural Diamonds Formed?

Most natural diamonds form approximately 140–200 kilometres below the Earth’s surface, in ancient, stable areas of the mantle beneath the continents. Some rare diamonds are known to originate much deeper.

At these depths, carbon-bearing materials:

·   Encounter extremely high pressure

·   Are exposed to high temperatures

·   Crystallise within a suitable chemical environment

·   Form a stable diamond structure

Temperature or pressure alone is not sufficient. The right chemical environment must accompany these conditions. Under suitable circumstances, carbon atoms bond extremely strongly to one another and form a diamond crystal.

Diamonds do not all form at the same time or through a single geological event. Some crystals grow during different periods and may preserve microscopic traces of their formation history.

How Long Does It Take for Diamonds to Form?

There is no single answer to “How many years does a diamond take to form?” that applies to every diamond. The time taken for crystallisation and the geological age measured today are not the same thing.

Scientific research shows that most natural diamonds are more than one billion years old. The formation ages of some studied diamonds extend back approximately 3.3–3.5 billion years.

Many formed long before plants and dinosaurs appeared on the Earth’s surface. A natural diamond is therefore not merely a precious stone but a geological record that has survived from extremely ancient periods of our planet.

Tiny mineral inclusions within a crystal can provide scientists with important information about its formation environment, approximate age and processes within the Earth’s mantle.

Are Diamonds Formed from Coal?

One of the most frequently repeated beliefs about diamonds is that coal turns into diamond under high pressure. This is not an accurate explanation for most natural diamonds.

Coal forms from ancient plant material that accumulated in areas close to the Earth’s surface. Most diamonds crystallised much deeper than coal deposits and long before coal itself existed.

Although both contain carbon, this does not mean that coal is the principal source of natural diamonds. Diamond carbon may come from materials in the Earth’s mantle or from carbon-bearing compounds carried deep underground by plate movements.

The statement “coal becomes diamond when exposed to enough pressure” is therefore not a scientific description of the geological story of natural diamonds.

How Do Diamonds Reach the Earth’s Surface?

Diamonds do not rise from their formation depth by themselves. Extremely rapid and powerful volcanic activity carries them towards the surface.

Magmas called kimberlite—and, less commonly, lamproite—move upwards from deep within the mantle and carry diamond crystals with them. When the magma reaches the surface or solidifies close to it, it forms volcanic rock structures that may contain diamonds.

The ascent must be geologically rapid for diamonds to reach the surface without being damaged. Magma rising too slowly or presenting unfavourable chemical conditions can alter the diamond structure or partially dissolve it.

Not every kimberlite formation reaching the surface contains diamonds in economic quantities or of jewellery quality. Discovering a diamond-bearing deposit therefore requires extensive research and detailed geological investigation.

Primary and Secondary Diamond Deposits

Diamonds are not found only within the volcanic rock that first carried them upwards.

Primary deposits are formations in which diamonds remain within host rocks such as kimberlite or lamproite.

Over time, rain, wind, rivers and other erosive forces can break down the host rock. Released diamonds may be transported by waterways and accumulate in riverbeds, alluvial deposits and some coastal areas. These are known as secondary or alluvial diamond deposits.

Diamond’s great hardness and chemical durability help it survive this long natural journey.

Why Is Diamond So Hard?

Diamond ranks 10 on the Mohs hardness scale and has the greatest resistance to scratching among natural minerals.

This hardness arises from the strong, three-dimensional crystal lattice formed by its carbon atoms. Powerful bonds between each atom and its neighbours make the crystal surface extremely difficult to scratch.

Hardness and resistance to breaking, however, are not the same property.

Although highly resistant to scratching, diamond can cleave along particular crystal directions or chip at an edge under a hard impact. Setting security is especially important for pointed shapes such as pear, marquise and princess cuts.

Diamond jewellery is durable in daily wear, but it should still be protected from heavy impacts and have its settings inspected periodically.

What Do the Traces Inside a Diamond Reveal?

Natural diamonds may contain small minerals trapped during crystallisation. In jewellery assessment, these are called inclusions and can affect the stone’s clarity grade.

For scientists, however, some inclusions are extremely valuable. As mineral samples from inaccessible depths of the Earth, they carry information about the environment in which the diamond formed.

These tiny traces can help researchers:

·   Investigate the diamond’s approximate formation age

·   Learn about the depth at which the crystal formed

·   Examine chemical processes in the Earth’s mantle

·   Trace carbon’s journey between the surface and deep mantle

A minute inclusion invisible to the naked eye in a polished diamond may be an important scientific record of our planet’s history billions of years ago.

Are Diamonds Found in Meteorites?

Microscopic diamond crystals have been found in some meteorites. The sudden pressure generated by large meteorite impacts can also cause very small diamonds to form in carbon-bearing material at the impact site.

These diamonds should not be confused with the natural diamonds used in jewellery. The principal source of jewellery-quality natural diamonds is the geological activity occurring within the Earth’s deep mantle.

The presence of diamonds in space or meteorites is an intriguing scientific finding showing that carbon can transform into the diamond crystal structure in different environments when conditions are suitable.

Where Did the Historical Journey of Diamonds Begin?

India is one of the earliest known centres of the diamond trade. Historical sources show that it remained an important source of diamonds for the world for centuries.

Diamonds mined in India travelled along trade routes to Persia, the Middle East and Europe. The Golconda region in particular became one of the most important centres of the diamond trade during the sixteenth and seventeenth centuries.

In the eighteenth century, the discovery of diamond deposits in Brazil began to shift the centre of global trade. Major deposits found in South Africa during the second half of the nineteenth century then reshaped diamond mining and the international jewellery industry.

Today, natural diamonds are mined in various regions of Africa as well as in Russia, Canada, Australia and other parts of the world.

The Meaning of Diamonds in Mythology and Culture

Modern science explains the true geological formation of diamonds. When people first encountered the stone, however, they interpreted its hardness and unusual appearance through legends.

In the ancient world, diamonds were said to possess extraordinary protective powers and were associated with courage and invincibility. Some traditions used poetic descriptions such as fragments of stars, tears of the gods or solidified lightning.

The English word “diamond” derives from the Ancient Greek *adamas*, associated with meanings such as “invincible” or “untameable”. The name reflects the stone’s extraordinary known hardness.

These are not scientific facts but cultural and symbolic meanings assigned to diamonds in different periods. They nevertheless help explain why diamonds have been associated with strength, permanence and eternity for centuries.

How Did Diamonds Become a Symbol of Love?

Diamond’s durability gradually came to symbolise lasting commitment. One of the earliest recorded diamond engagement rings was given by Archduke Maximilian of Austria to Mary of Burgundy in 1477.

Diamond rings became widely popular in their modern form much later. Advances in cutting techniques, the growth of diamond supply and the expansion of modern jewellery production made the stone accessible to broader audiences.

Its history spanning billions of years, durable structure and ability to retain its light made the diamond a meaningful symbol for marriage proposals, wedding anniversaries and important milestones in life.

How Is a Rough Diamond Transformed into a Brilliant?

A diamond recovered from nature often looks very different from the polished gemstone seen in a display case. The sparkling appearance emerges when experienced craftspeople process the natural crystal using advanced technology.

Examination and Planning

The shape, crystal structure, inclusions and weight of the rough diamond are examined in detail. The aim is not simply to obtain the largest possible stone. Value, durability and light performance must be balanced correctly.

Modern production can use three-dimensional scanning and computer-assisted planning. The positions of the sections to be cut are determined precisely on the rough stone.

Dividing and Shaping

Depending on the plan, the rough diamond may be cut with a laser, sawn or separated along its natural cleavage directions.

The outer outline is then shaped. The final form—round, oval, pear, marquise, emerald, princess or baguette—becomes apparent during these stages.

Creating the Facets

Flat surfaces called facets are cut into the stone at specific angles and proportions. Their arrangement affects the entry of light, its movement within the diamond and its return to the observer.

A standard round brilliant-cut diamond generally has 57 facets, or 58 when the culet is included.

Polishing and Inspection

Every facet is polished carefully, and the symmetry, surface quality and proportions are checked. Even a very small change in cutting angle can affect brilliance and light performance.

In this way, a rough diamond created by nature becomes a sparkling brilliant through human craftsmanship and design expertise.

How Does a Diamond’s Sparkle Arise?

No single characteristic creates diamond sparkle. Cut proportions, facet angles, symmetry and polish work together.

Diamond light performance can be explained through three principal visual effects:

·   **Brilliance:** White light returned from the diamond to the observer.

·   **Fire:** White light separated into the colours of the rainbow.

·   **Scintillation:** The lively pattern of light and dark areas seen as the diamond or observer moves.

A high carat weight alone does not guarantee strong sparkle. A successful cut enables the diamond to use available light more effectively.

How Is Diamond Quality Assessed?

Cut and polished diamonds are assessed according to international criteria. Four principal characteristics, known as the 4Cs, are used:

·   **Carat:** The diamond’s weight.

·   **Colour:** How closely the stone approaches colourlessness.

·   **Clarity:** The type, location and visibility of internal and external characteristics.

·   **Cut:** Particularly for round brilliant diamonds, the stone’s proportions, workmanship and light performance.

The 4Cs should be considered together. Two diamonds of the same carat weight can have different appearances and values because of their colour, clarity and cut.

A laboratory report provides reliable information about the measurements and quality characteristics of the stone examined. It does not, however, determine the jewellery design or personal preference on its own.

Do Natural and Laboratory-Grown Diamonds Form in the Same Way?

The fundamental crystal structures of natural and laboratory-grown diamonds can both consist of carbon atoms, but their origins and formation processes are different.

A natural diamond is the product of geological processes deep within the Earth and usually has a history of billions of years. A laboratory-grown diamond is created far more quickly in a controlled environment where technology reproduces natural formation conditions.

This distinction cannot always be made from appearance alone. Gemmological examination and advanced laboratory instruments may be needed to determine origin.

Storks Diamond jewellery uses natural gemstones, which undergo checks by international laboratories. This makes confidence in the characteristics and origin of the stone as important as the aesthetic qualities of the chosen jewellery.

What to Consider When Choosing Diamond Jewellery

Do not focus only on the size of the stone when choosing diamond jewellery.

·   Assess all four of the diamond’s 4C characteristics together.

·   Examine the information in the laboratory report.

·   Ensure that natural or laboratory-grown origin is stated clearly.

·   Confirm that the setting holds the stone securely.

·   Choose a cut suited to wearing habits.

·   Check the workmanship and comfort of the jewellery.

·   Research after-sales care and support services.

A balanced choice suited to the wearer’s style, budget and intended use can be more satisfying than pursuing high carat weight alone.

Storks Diamond Collections

Storks Diamond combines the natural diamond’s billion-year story with distinguished craftsmanship and contemporary design.

Diamond rings accompany special moments as powerful expressions of love and commitment. Diamond necklaces adapt to everyday and occasion wear through timeless designs that frame the face. Diamond earrings bring light to the face, while diamond bracelets complete a style with elegant detail.

Each design prioritises the stone’s natural character, setting security and the ability to wear the jewellery for many years.

Conclusion: The Brilliance of a Billion-Year Journey

The diamond’s story begins with the crystallisation of carbon atoms deep within the Earth. After remaining in the mantle for billions of years, the crystals are carried towards the surface by powerful volcanic activity. The recovered rough diamond becomes a brilliant-cut gemstone after careful planning and expert cutting.

Associated throughout history with strength, protection, devotion and eternity, the diamond remains at the centre of jewellery symbolising life’s most precious moments.

The sparkle of a diamond contains more than reflected light: it brings together the Earth’s geological past, the patience of nature and the work of the jewellery craftsperson. This extraordinary journey is precisely what makes it timeless.