In the world of fine jewellery, few topics spark as much conversation today as the choice between natural and lab-grown diamonds. At Serena Ansell Fine Jewellery, Serena’s philosophy is simple: "doing things properly." For a piece to be a true heirloom, it must be crafted from materials that possess both enduring beauty and intrinsic rarity.
While lab-grown stones have become a modern fixture, Serena’s commitment to natural, ethically sourced diamonds remains unwavering. To help you understand this choice, we’ve explored the science, the stories, and the long-term value behind these two very different stones.
A Tale of Two Origins: How Diamonds Are Formed
The primary difference between a natural and a lab-grown diamond is how they are made, not what they look like.
1. The Natural Miracle (Billions of Years)
Natural diamonds are one of the Earth’s most ancient treasures. They were formed over one to three billion years ago, approximately 100 miles beneath the Earth’s surface. Under conditions of intense heat (over 1,000°C) and immense pressure, carbon atoms bonded together in a unique crystal lattice. These stones remained hidden until volcanic eruptions carried them toward the surface in "kimberlite pipes," where they could eventually be discovered. Each natural diamond is a finite, prehistoric survivor - a tiny capsule of the Earth’s history.
2. The Lab-Grown Innovation (A Matter of Weeks)
Lab-grown diamonds are created in a controlled environment using advanced technology that mimics the Earth’s mantle. There are two primary methods:
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HPHT (High Pressure, High Temperature): This method uses a large press to subject a tiny diamond "seed" to extreme heat and pressure, forcing carbon to crystallise around it.
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CVD (Chemical Vapour Deposition): A diamond seed is placed in a vacuum chamber filled with carbon-rich gas. When the gas is heated into plasma, carbon atoms break away and "snow" down onto the seed, building the diamond layer by layer.
While the result is chemically a diamond, it is an industrial product of the present day rather than a rare marvel of the past.
Can You Tell the Difference?
To the naked eye, even a seasoned gemmologist cannot distinguish a top-quality lab-grown diamond from a natural one. They share the same brilliance, fire, and hardness (10 on the Mohs scale). However, they are not identical under the microscope.
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Growth patterns: Because they grow in weeks rather than billions of years, lab diamonds display different "growth morphology."
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Trace elements: Natural diamonds almost always contain tiny amounts of nitrogen trapped during their long stay in the Earth. Lab-grown diamonds (particularly CVD stones) often contain no nitrogen at all.
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Specialist testing: At Serena Ansell Fine Jewellery, we rely on Serena’s GIA expertise and specialist laboratory equipment to verify a stone’s origin. Professional grading reports from the GIA or IGI will always clearly state whether a stone is "natural" or "laboratory-grown."
Long-Term Value and the Heirloom Investment
When Serena designs a bespoke piece, she is designing for the future. This is where the paths of natural and lab-grown diamonds diverge most sharply.
The Investment Reality of 2026
In 2026, the price gap between the two has widened significantly. Lab-grown diamonds now retail for 75–85% less than natural diamonds. While this makes a large "look" more accessible today, it impacts the stone's long-term worth:
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Natural Diamonds (Scarcity): Because natural diamonds are a finite resource and mines are gradually being exhausted, they hold their value remarkably well. They have a "price floor" supported by their rarity. A natural diamond is a store of value - a piece of wealth you can wear and eventually pass down.
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Lab-Grown Diamonds (Supply): Lab diamonds are a product of technology. As production becomes more efficient and factories multiply, the supply is essentially infinite. Much like a piece of high-end electronics, the resale value of a lab diamond typically drops sharply (often retaining only 10–20% of its original price) because a brand-new, cheaper version is always available.
"A piece of jewellery is a vessel for a story. For that story to be told a hundred years from now, the materials must have an enduring soul. That is why I only source natural stones." - Serena Ansell