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Family Jewellers of Birmingham FOR OVER 40 YEARS - Book Appointment | WhatsApp
Family Jewellers of Birmingham FOR OVER 40 YEARS - Book Appointment | WhatsApp
Two people walk into a jeweller. Both want a diamond engagement ring. One leaves with a natural diamond. The other leaves with a lab-grown diamond. Both stones are chemically identical. Both sparkle the same way under the same light. And yet, they are very different purchases in terms of price, origin and long-term value.
The lab-grown vs natural diamond question has become one of the most searched topics in UK jewellery buying over the past three years. Couples want to understand what they are actually getting before they spend a significant amount of money.
This guide covers exactly that: what a lab-grown diamond is, how lab-grown diamonds compare to real diamonds on every practical measure, and which choice makes sense depending on what matters most to you.
If you want to see both side by side, Manna Jewellers stocks natural and lab-grown diamond engagement rings in Birmingham's Jewellery Quarter. You can compare stones in person before making any decision.
A lab-grown diamond is a real diamond. It has the same chemical composition, crystal structure and optical properties as a natural diamond.
Lab diamonds vs real diamonds on price: lab-grown stones typically cost 50 to 80 per cent less than natural diamonds of comparable grade.
Natural diamonds form over billions of years underground. Lab-grown diamonds are produced in controlled environments over a matter of weeks.
Both types are graded using the same 4Cs standard: cut, colour, clarity and carat.
Lab-grown diamonds can be certified by the same independent bodies, including GIA and IGI.
Natural diamonds tend to hold their resale value better than lab-grown diamonds, whose prices have fallen significantly since 2021.
Neither is the wrong choice. The decision depends on whether size, price, or rarity matters more to you.
A lab-grown diamond is a diamond produced in a laboratory rather than extracted from the earth. The two main production methods are High-Pressure High-Temperature (HPHT) and Chemical Vapour Deposition (CVD). Both replicate the conditions under which natural diamonds form, using either extreme pressure and heat or a carbon-rich gas environment to grow a diamond crystal.
The result is a stone with the same atomic structure as a mined diamond: pure carbon arranged in a cubic crystal lattice. It has the same hardness (10 on the Mohs scale), the same refractive index, and the same range of colours and clarities. Gemologists cannot distinguish a lab-grown diamond from a natural diamond with the naked eye. Specialist equipment is required to identify the origin.
Key facts about lab-grown diamonds:
A lab-grown diamond is chemically and physically identical to a natural diamond. The only difference is where and how it formed.
Both HPHT and CVD methods produce genuine diamonds, not simulants. Cubic zirconia and moissanite are simulants. A lab-grown diamond is not.
Production time is weeks, not billions of years, but the resulting crystal structure is the same.
Lab-grown diamonds are graded using the same 4Cs system (cut, colour, clarity, carat) by the same independent bodies: GIA, IGI and HRD.
A GIA or IGI certificate for a lab-grown diamond will clearly state the stone's origin, grade and any laser inscription on the girdle.
Lab-grown diamonds are not the same as diamond simulants such as cubic zirconia or moissanite. Those are different materials that visually resemble diamonds. A lab-grown diamond is a diamond produced by a different process.
At Manna Jewellers, we work with GIA, IGI and HRD-certified diamonds, both natural and lab-grown. Our fairtrade diamond and sourcing page explains how we approach responsible sourcing across both types.
On appearance, lab-grown vs natural diamond is effectively a draw. Both produce the same sparkle, brilliance and fire when well cut. A poorly cut natural diamond will look worse than a well-cut lab-grown diamond of a smaller carat weight, because cut has a greater influence on appearance than origin.
Both types are graded on the same 4Cs scale, and both can achieve the highest colour and clarity grades. A D-colour, internally flawless lab-grown diamond exists, just as a natural equivalent does.
The most significant practical difference between lab diamonds and real diamonds is price. A 1-carat natural diamond of good quality (G colour, VS2 clarity, excellent cut) typically costs between £3,000 and £5,000 in the UK. A lab-grown stone of equivalent grade typically costs £800-£1,500.
That price gap means a buyer who chooses a lab-grown diamond can either spend significantly less for the same grade or spend the same budget to get a noticeably larger or better-graded stone.
For engagement rings specifically, this is a meaningful consideration. A lab-grown diamond engagement ring priced at £1,500 can include a stone that would cost three to four times more if mined naturally.
Natural diamonds retain value better than lab-grown diamonds. The resale market for natural diamonds is established, with prices tied to rarity and the finite supply of mined stones. Lab-grown diamond prices have dropped significantly over the past few years as production has scaled. A lab-grown diamond bought in 2021 is worth considerably less today.
For buyers who see an engagement ring as a long-term asset or potential heirloom, natural diamonds carry a stronger case on this measure. For buyers who prioritise the ring itself over resale potential, this point carries less weight.
The environmental argument is more complex than it first appears. Mining natural diamonds involves land disruption and significant energy use. Lab-grown diamond production also uses large amounts of energy, and the environmental impact depends heavily on the energy source powering the facility. Some lab-grown producers use renewable energy. Others do not.
Neither option is straightforwardly clean, and neither is clearly worse. Buyers with environmental concerns should ask specifically about the seller's sourcing practices and the lab-grown stone's production location.
Expert tip: The Gemmological Association of Great Britain (Gem-A) provides guidance on interpreting diamond grading reports and distinguishing natural from synthetic stones. When buying a diamond of any origin, always ask for a grading certificate from an independent body such as GIA, IGI or HRD. The certificate independently confirms the stone's grade, regardless of what the seller says.
|
Natural diamond |
Lab-grown diamond |
|
|
Chemical composition |
Pure carbon (same) |
Pure carbon (same) |
|
Hardness |
10 Mohs |
10 Mohs |
|
Grading standard |
4Cs (GIA, IGI, HRD) |
4Cs (GIA, IGI, HRD) |
|
Price per carat |
Higher |
50-80% lower |
|
Resale value |
Retains value better |
Has declined significantly |
|
Formation time |
Billions of years |
Weeks |
|
Identifiable difference |
Only with specialist equipment |
Only with specialist equipment |
|
Environmental impact |
Mining-related |
Energy-intensive production |
|
Availability |
Finite supply |
Growing supply |
The answer depends on two things: what you value in the purchase, and how you plan to spend the budget.
Choose a lab-grown diamond engagement ring if the stone's size and visual quality are the priority and resale value is not a major concern. The price difference means you can get a noticeably larger or better-graded stone for the same spend.
Choose a natural diamond engagement ring if the rarity and long-term value of a mined stone matter to you, or if the idea of a stone formed naturally over billions of years carries meaning that a lab-grown stone does not.
Both are genuine diamonds. Both look the same. Both wear the same. The difference is in origin, price and what the stone represents to the person wearing it.
Yes. Lab-grown diamonds are cut into the same shapes as natural diamonds: round brilliant, princess, oval, pear, cushion, emerald, radiant, marquise, and more. They can be set in any engagement ring style, including solitaires, halos, trilogy settings and pavé bands, across all metals.
Our guide to diamond shapes covers all the main cuts if you are deciding which shape suits the ring design you have in mind.
With the naked eye, the answer is no. Even experienced gemologists cannot identify a lab-grown diamond visually without specialist equipment. The Gemological Institute of America (GIA) and other grading bodies use advanced spectroscopy and other tools to identify growth characteristics specific to each production method.
Some lab-grown diamonds are inscribed with a microscopic laser marking on the girdle (the outer edge of the stone) indicating their lab-grown origin. This marking is invisible to the naked eye but can be read under magnification. Not all lab-grown stones carry this marking.
A lab-grown diamond is a diamond produced in a controlled laboratory environment using either HPHT or CVD technology. It has the same chemical composition, crystal structure and physical properties as a naturally mined diamond. It is not a simulant or imitation stone. Gemologists and grading laboratories like GIA and IGI assess lab-grown diamonds using the same 4Cs criteria used for natural diamonds.
Yes. Lab-grown diamonds are real diamonds by every scientific and gemological definition. They are made of pure carbon in a cubic crystal lattice structure, exactly like natural diamonds. The only difference is origin. Independent grading laboratories certify both types, and both carry the same optical and physical properties, including hardness, brilliance and fire.
Lab-grown diamonds currently cost between 50 and 80 per cent less than natural diamonds of the same grade. A 1-carat G colour, VS2 clarity natural diamond might cost £3,000 to £5,000. A lab-grown stone of the same grade typically costs £800 to £1,500. The price gap has widened in recent years as lab-grown production has increased and prices have fallen.
Lab-grown diamonds have not retained value as well as natural diamonds. Prices for lab-grown stones have fallen significantly since around 2021, as production capacity has increased and supply has grown. Natural diamonds, being finite, have historically held value better over time. Buyers who want a diamond primarily as a financial asset should be aware that lab-grown diamonds currently carry lower resale values.
A jeweller cannot tell just by looking. Specialist equipment is required to identify a lab-grown diamond with certainty. Grading certificates from GIA, IGI or HRD will state whether a stone is natural or lab-grown. When buying any diamond, asking for a grading certificate is the most reliable way to independently verify its origin and grade.
Manna Jewellers is a family jewellery business based at 16 Hockley Street in Birmingham's Jewellery Quarter, trading since 1977. We stock natural and lab-grown diamond engagement rings across all major settings and metals. We work with GIA, IGI and HRD-certified stones. All jewellery sold through Manna Jewellers is hand-finished in our Birmingham Jewellery Quarter workshop before it reaches the customer. We source our diamonds and gemstones from organisations accredited with responsible social and environmental practices. Visit us in-store or book an appointment to compare lab-grown and natural diamonds in person.
A friendly guide to engagement ring settings: which one is right for you? - Once you have decided between lab-grown and natural, the setting choice is the next step
A guide to diamond and gemstone shapes - understanding which cut maximises the appearance of your chosen diamond, whether lab-grown or natural.
How much does an engagement ring cost? - how lab-grown diamonds affect engagement ring budgets and what you can expect to spend
