Lab Grown vs Natural Diamonds: What’s the Difference?
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how to choose a diamond
The difference between lab grown and natural diamonds is their origin. Natural diamonds are formed over billions of years beneath the Earth, while lab grown diamonds are created in controlled laboratory environments. Chemically, physically and visually, they are identical — meaning you cannot tell the difference by looking at them.
In this guide
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What lab grown and natural diamonds are
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The key differences explained clearly
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How price compares
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Which option is better for you
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Common myths debunked
What Is a Natural Diamond?
Natural diamonds are formed deep within the Earth under extreme heat and pressure over billions of years. They are mined, cut and polished before being set into jewellery.
Because of their natural origin, each diamond carries a unique geological history, which contributes to its rarity and value.
What Is a Lab Grown Diamond?
Lab grown diamonds are created using advanced technology that replicates the natural diamond formation process. The two primary methods are HPHT (High Pressure High Temperature) and CVD (Chemical Vapour Deposition).
The result is a diamond that is chemically and visually identical to a natural diamond in every measurable way — unlike simulants such as cubic zirconia or moissanite, which differ in composition and display a noticeably different type of brilliance.
Lab Grown vs Natural Diamonds: Key Differences
| Feature | Natural Diamond | Lab Grown Diamond |
|---|---|---|
| Origin | Formed in the Earth | Created in a laboratory |
| Appearance | Identical | Identical |
| Composition | Carbon crystal | Carbon crystal |
| Sparkle | Same (depends on cut) | Same (depends on cut) |
| Certification | GIA / IGI / SGL | IGI / GIA / SGL |
| Price | Higher | 60–80% more affordable |
| Rarity | Naturally rare | Manufactured |
Can You Tell the Difference Between Lab and Natural Diamonds?
No — you cannot tell the difference between lab grown and natural diamonds with the naked eye.
Both diamonds have the same brilliance, fire and sparkle, and even trained gemmologists cannot reliably distinguish them without specialised equipment designed to detect growth patterns. If someone claims they can tell just by looking, that is not accurate — origin is confirmed either through specialised testing or by matching the diamond’s laser inscription to its certification from a recognised gemmological laboratory, such as GIA, IGI or SGL.
Why Are Lab Grown Diamonds Cheaper?
Lab grown diamonds are more affordable because they are produced in controlled environments rather than mined from the Earth.
This removes many of the costs associated with mining, transport and rarity.
For buyers, this often means:
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A larger diamond for the same budget
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Higher colour and clarity grades
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Greater flexibility when designing a custom engagement ring
Which Is Better: Lab Grown or Natural Diamonds?
Neither is inherently better — the right choice depends on your priorities.
We recommend lab grown diamonds if:
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You want to maximise size and value
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You prefer a more budget-efficient option
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You want higher specifications for the same price
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You are mindful of how your diamond is sourced
We recommend natural diamonds if:
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You value rarity and natural origin
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You prefer traditionally formed diamonds
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You appreciate the uniqueness of a stone formed over billions of years
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You have the flexibility in budget to prioritise origin over size
At Carat House, we work with both, allowing you to choose based on what matters most to you.
Do Lab Grown Diamonds Look Different?
No — lab grown diamonds look identical to natural diamonds.
They have the same:
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Sparkle
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Clarity
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Colour range
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Hardness (10 on the Mohs scale)
The only difference is how they were created.
Common Myths About Lab Grown Diamonds
“Lab diamonds are fake”
Lab grown diamonds are real diamonds with the same chemical composition as natural diamonds.
“They don’t sparkle as much”
Sparkle is determined by cut quality, not origin.
“You can tell the difference visually”
You cannot — even professionals require specialised equipment.
Our Recommendation
We guide each client based on their priorities.
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For value and size, we recommend lab grown diamonds
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For rarity and origin, we recommend natural diamonds
Both options can be exceptional when selected correctly.
You can explore our full collection of lab and natural diamond engagement rings here:
If you’d like personalised guidance, you can book a consultation with a Carat House diamond specialist:
Final Thoughts
Lab grown and natural diamonds offer the same beauty, durability and brilliance.
The decision ultimately comes down to what matters most to you — origin, price, rarity and personal preference.
Need Help Choosing?
If you'd like personalised guidance, you can book a consultation with the Carat House team to explore diamond options and engagement ring designs.
FAQ
Are lab-grown diamonds real diamonds?
Yes — they are chemically and physically identical to natural diamonds.
Can you tell the difference between lab and natural diamonds?
No — not without specialised equipment or by matching the inscription to the diamond certificate.
Why are lab grown diamonds cheaper?
Because they are created in controlled environments rather than mined, reducing costs. and are more readily available than natural diamonds.