Decoding Jewellery Buying: Lab-Grown vs. Natural Diamonds Uncovered

When it comes to choosing the perfect diamond, there’s a new player in town: lab-grown diamonds. They’re causing quite a stir in the jewellery world. But are they really on par with their natural counterparts?

In this in-depth comparison, we’ll be exploring the key differences between lab-grown and natural diamonds. From their formation process to their physical properties, we’ll dissect every aspect to help jewellery buyers make an informed choice.

Formation Process of Lab-Grown Diamonds

To examine the distinguishing characteristics between lab-grown and natural diamonds, it’s pivotal to first understand the formation process of lab-grown diamonds. It’s not a simple feat, and the technology behind it has been fine-tuned over years of intense research and development efforts.

Lab-grown diamonds, also referred to as synthetic or man-made diamonds, are created in controlled laboratory environments using one of two main techniques: High-Pressure High-Temperature (HPHT) or Chemical Vapour Deposition (CVD).

High-Pressure High-Temperature (HPHT)
In the HPHT method, carbon atoms are exposed to extreme pressures and temperatures similar to those found deep within the Earth’s crust. This intense environment triggers the carbon into crystallising into a diamond structure. HPHT remains one of the oldest and most common laboratory methods for diamond creation.

Chemical Vapor Deposition (CVD)
The CVD technique takes a different approach, growing diamonds from a hydrocarbon gas mixture in a vacuum chamber at relatively low pressures and temperatures. This method allows for the growth of larger crystals and the production of higher purity diamonds.

Even though their man-made origin, lab-grown diamonds still possess the same physical, chemical, and optical properties as natural diamonds. As a result, they’re challenging traditional perceptions of what a ‘real’ diamond should look like and where it should come from.

As the sector evolves, jewellery buyers are likely to witness continued advancements, creating an even more diverse market of diamond choices. Armed with understanding, consumers can make the right decision to suit their taste, ethics, and budget.

Formation Process of Natural Diamonds

Unlike lab-grown diamonds, natural diamonds have a unique formation process that’s certainly worth understanding. Their journey begins about 100 miles beneath Earth’s surface, deep within its mantle. Here, with a combination of intense heat of 1,000 -1,200 degrees Celsius and extreme pressure over billions of years, the carbon atoms bond in a unique way. This arrangement of carbon atoms results in what we marvel at today – a versatile, near-indestructible gemstone.

It’s only through volcanic activity that diamonds exist on the surface today. These diamonds hitch a ride to the surface in kimberlite, a type of igneous rock. Here they’re discovered in alluvial deposits and diamond mines.

An unavoidable reality is the environmental impact of these mining operations. Disruption to ecosystems, deforestation and in some countries, ethical concerns over labor practices factor into the equation. These are considerations prospective diamond buyers must be aware of. Even though the aura of romanticism surrounding naturally mined diamonds, it’s an area of the industry receiving significant critique.

This earthly recipe for diamond creation is one lab-grown diamonds are striving to replicate. With the former’s limitations and controversies, lab-grown counterparts are increasingly winning favour for ethical, economic and environmental reasons. But one can’t deny the allure the formation process and history of natural diamonds hold.

Physical Properties of Lab-Grown Diamonds

Just like diamonds formed over billions of years in the Earth’s mantle, lab-grown variants possess similar impressive physical properties. These include hardness, brilliance, and a wide array of colours that engender comparable allure to their natural counterparts.

Lab-grown diamonds rank 10 on the Mohs hardness scale, reflecting their superior durability. This resilience, coupled with their exceptional ability to refract and disperse light, makes lab-grown diamonds exquisite pieces for jewellery. Despite, they’re created in controlled laboratory environments using high-pressure, high-temperature (HPHT) or chemical vapour deposition (CVD) methods. So, scientists can manipulate conditions during formation to achieve desired diamond colours, an advantage over natural diamonds which are mainly subject to geologic variance.

An interesting aspect of lab-grown diamonds is how experts may identify them. Though indistinguishable to the naked eye from natural diamonds, the former reveals specific growth patterns and inclusions when viewed under high magnification or using specialised gemological tools. This distinction can be crucial for buyers seeking certainty on whether their purchase is naturally formed or lab-grown.

Movies emphasise the importance of “the four Cs” – cut, colour, carat, and clarity – while purchasing diamonds. These attributes apply equivalently to lab-grown diamonds. With the added benefit of a lower price point, it’s clear that lab-grown diamonds make a compelling alternative to traditional gems. This proposition may seem even more attractive considering the lower ethical and environmental implications associated with their production.

Physical Properties of Natural Diamonds

In the area of precious gemstones, natural diamonds stand apart. In terms of hardness, they’re indisputably the toughest, scoring a perfect 10 on the Mohs scale. This means they’re incredibly resistant to scratches and surface damage, a quality that contributes to their enduring appeal in jewellery.

Brilliance, or the way light interacts with a diamond, sets it apart in the mineral kingdom. It’s about the amount of light reflected back to the viewer’s eye from the interior of the diamond. Natural diamonds are renowned for their exceptional brilliance, exhibiting a high refractive index that ensures they sparkle more than any other gemstone.

Yet, natural diamonds aren’t only about hardness and brilliance. They’re also about colour. Typically, they vary from colourless to light yellow or light brown. But, on occasion, nature produces diamonds in blues, greens, yellows and even rare pinks and reds. These “fancy coloured” diamonds derive their hues from trace amounts of elements like boron or nitrogen.

Differentiating natural diamonds from their lab-grown counterparts requires expertise. Certain growth patterns and inclusions, only visible under magnification, serve as tell-tale signs. The Kimberley Process Certification Scheme provides assurance to buyers that their diamonds are not only natural but also ethical, harvested without causing harm to the environment or societies.

Making an Informed Choice as a Jewellery Buyer

The decisive factor in choosing between natural and lab-grown diamonds often boils down to personal preference, budget considerations, and ethical concerns. It’s crucial for potential buyers to arm themselves with knowledge about both types.

Understanding the difference between lab-grown and natural diamonds isn’t simply a matter of origin. Yes, each one begins in a different environment – one below the Earth’s surface, the other in a carefully controlled laboratory. But the dissimilarities don’t stop there.

Another key factor to consider is the historical value and rarity of natural diamonds. These gems have an allure that’s steeped in ancient history and often bear unique identifiers such as inclusions or particular growth patterns. Keep in mind that each natural diamond comes with a story and a certificate, making it more than a sparkling accessory; it’s a legacy of time.

Conversely, lab-grown diamonds offer a modern, sustainable alternative. If ethical sourcing and environmental considerations are top priorities, these diamonds align with those values. Besides, they offer similar aesthetic qualities as natural diamonds but are often more affordable, making them a smart choice for budget-conscious consumers.

It’s worth noting that all diamond purchases should come with independent certification. Whether it’s a natural beauty from the depths of the Earth or a lab-crafted marvel, ask for a certificate from recognised entities like the Gemological Institute of America (GIA) or European Gemological Laboratory (EGL).

Through understanding each option’s inherent qualities and the values they represent, buyers can make a confident, well-well-informed choice perfectly tailored to their needs.


It’s clear that both natural and lab-grown diamonds have their unique appeal and considerations. For those captivated by the allure of history and rarity, natural diamonds hold a distinct charm. But, if budget and sustainability are at the forefront, lab-grown diamonds offer a modern, affordable alternative. Crucially, it’s the buyer’s personal preference, budget, and ethical stance that will guide this choice. Remember, irrespective of the diamond’s origin, always seek independent certification from trusted entities like the GIA or EGL. This ensures you’re making a well-well-informed choice that’s tailored to your needs. Whether you’re drawn to the timeless mystique of natural diamonds or the sustainable appeal of lab-grown ones, remember a diamond’s true value lies in what it means to you.

Frequently Asked Questions

Q1: What influences the choice between natural and lab-grown diamonds?

The choice between natural and lab-grown diamonds is influenced by personal preferences, budget considerations, and ethical concerns.

Q2: What significant attributes does a natural diamond carry?

Natural diamonds carry historical value and rarity. Each natural diamond carries its unique identifiers and stories.

Q3: How do lab-grown diamonds compare to natural diamonds?

Lab-grown diamonds offer similar aesthetics to natural diamonds but at a more affordable price. They also appeal to consumers due to their sustainable production process.

Q4: What is the role of independent certification in purchasing diamonds?

Independent certification plays a significant role in purchasing diamonds. It ensures buyers have accurate information about the diamond’s attributes, helping them make well-informed decisions. Seek a certificate from reputable entities such as the Gemological Institute of America (GIA) or European Gemological Laboratory (EGL).

Q5: Are lab-grown diamonds a more sustainable choice?

Yes, lab-grown diamonds are a more sustainable choice as they are not mined from the earth but rather produced in a lab, reducing environmental impact extensively.

Q6: Are lab-grown diamonds cheaper than natural diamonds?

Yes. Despite sharing a similar aesthetic appeal, lab-grown diamonds are generally more affordable than natural diamonds due to differences in production and sourcing costs.