Diamond Education Center | Material Properties of Diamond

Diamonds have fascinated humanity for centuries with their unparalleled beauty, rarity, and mystique. These precious gemstones hold a special place in our hearts, symbolizing love, luxury, and enduring commitment. To truly appreciate and understand the world of diamonds, one must embark on a journey of education and exploration. Enter the Diamond Education Center, a beacon of knowledge and enlightenment for all those curious about the mesmerizing world of diamonds. In this article, we delve deep into the fascinating realm of diamond education, focusing on material properties, formation processes, and geological settings.


Material Properties of Diamonds

Diamonds are renowned for their exceptional material properties, making them the hardest natural substance known to mankind. The key properties that set diamonds apart are:

Material Properties of Diamonds

Hardness: Diamonds are famously known for their extraordinary hardness. In fact, they are the hardest naturally occurring substance on Earth. This remarkable property is attributed to the strong covalent bonds that hold the carbon atoms in a diamond’s crystal lattice together. As a result, diamonds are highly resistant to scratching, abrasion, and wear. This hardness is often quantified using the Mohs scale of mineral hardness, where diamonds are assigned a perfect score of 10.


Transparency: Diamonds exhibit exceptional transparency, allowing light to pass through with little obstruction. This transparency is due to the lack of impurities and defects in their crystal structure. When properly cut and polished, diamonds can maximize their transparency, enabling the passage of light and creating the stunning brilliance and sparkle that we associate with them.


Dispersion: Diamond’s ability to disperse light into its spectral colors is another captivating property. This dispersion is responsible for the “fire” effect seen in diamonds, where flashes of colored light dance within the gemstone. The high refractive index of diamonds causes light to bend and separate into its constituent colors, creating a dazzling play of colors.


Luster: Diamonds possess a mesmerizing luster that adds to their overall beauty. Their ability to reflect and refract light creates an unparalleled shine, often described as a “diamond’s sparkle.” This luster is a product of the high refractive index and well-executed cutting and polishing techniques.


Durability: Beyond their hardness, diamonds are incredibly durable. They can withstand extreme conditions, including high temperatures and pressure. This durability makes them suitable for various applications beyond jewelry, such as industrial cutting, drilling, and grinding.


Thermal Conductivity: Diamonds have exceptional thermal conductivity. They are excellent conductors of heat, meaning they can quickly dissipate heat away from their surface. This property makes them valuable for use in certain industrial applications, such as heat sinks in electronics.


Chemical Stability: Diamonds are chemically inert and do not readily react with most chemicals or acids, adding to their stability and longevity.


Weight and Density: Diamonds are relatively dense gemstones, and their weight is typically measured in carats. A carat is equivalent to 0.2 grams. The high density of diamonds contributes to their substantial feel when worn as jewelry.


How Diamonds Are Formed

The formation of diamonds is a remarkable geological process that occurs deep within the Earth’s mantle, approximately 90 to 120 miles below the surface. This process can be summarized in the following steps:

How Diamonds Are Formed

Carbon Source: Diamonds are primarily composed of carbon atoms. The carbon needed for diamond formation can originate from various sources, including organic material buried deep within the Earth or carbon-rich minerals.


High Pressure and Temperature: The critical factor in diamond formation is the combination of extreme pressure and temperature found in the Earth’s mantle. These conditions, often exceeding 725,000 pounds per square inch (50,000 atmospheres) and 2,200 to 2,600 degrees Fahrenheit (1,200 to 1,400 degrees Celsius), cause carbon atoms to bond together in the unique crystal lattice structure that defines a diamond.


Volcanic Activity: Diamonds are brought closer to the Earth’s surface through volcanic eruptions in structures known as kimberlite pipes or lamproite pipes. These eruptions are rare and are responsible for transporting diamonds from the mantle to the crust.


The Geological Setting of Diamond Formation

Diamonds are typically formed in two distinct geological settings:



Diamond Formation: Cratons are the primary geological setting for diamond formation. The conditions necessary for diamond formation, namely extreme pressure and temperature, are typically found deep within cratonic regions. The thick lithospheric mantle beneath cratons provides the required depth for the process.


Definition: Cratons are the stable, ancient cores of continents. They are typically composed of thick, older continental crust and underlying lithospheric mantle. Cratons have been relatively undisturbed by tectonic activity for billions of years.


Notable Cratons: The African continent, including countries like Botswana, South Africa, and Angola, is renowned for its rich diamond deposits found within cratons. Additionally, the Canadian Shield is another significant cratonic region known for its diamond mines, such as Diavik and Ekati.


Oceanic Lithosphere:

Definition: The oceanic lithosphere is the Earth’s outermost layer that underlies the ocean basins. It consists of oceanic crust and the uppermost portion of the mantle beneath it.



The Diamond Education Center serves as a gateway to the captivating world of diamonds. Through its comprehensive educational programs and resources, individuals can gain a profound understanding of material properties, formation processes, and geological settings in the creation of these exquisite gems. As we continue to uncover the secrets of diamonds, their allure and fascination only grow, making them an enduring symbol of beauty, rarity, and enduring love.…