Chemically identical. Optically identical. Price? Very different.

Lab-Grown vs Natural Diamond:
Which Should You Choose?

Lab-grown and natural diamonds are chemically, physically, and optically identical. The only differences are origin, price, and resale value. Here are the facts.

Lab-Grown

Made in a lab in weeks. 50-70% less expensive. Chemically identical to natural. Minimal resale value.

Natural

Formed over billions of years. Full market price. Established resale market. Holds value better over time.

What Is a Lab-Grown Diamond?

Created, not faked

Lab-grown diamonds are produced using two methods: HPHT (High Pressure High Temperature) and CVD (Chemical Vapour Deposition). Both produce real diamonds with the same carbon crystal structure as natural stones. A jeweller cannot tell the difference without specialised equipment.

Same grading system

Lab-grown diamonds are graded by the same gemological laboratories (GIA, IGI, GCAL) using the same 4C system: Cut, Colour, Clarity, and Carat weight. The certificate will note “laboratory-grown” and the stone typically has a laser inscription on the girdle.

Important: “Lab-grown” does not mean “fake.” Cubic zirconia and moissanite are diamond simulants. Lab-grown diamonds are real diamonds with identical chemical, physical, and optical properties.

Price Comparison

How much you can expect to pay for comparable stones at current market prices.

1-Carat Round Brilliant

G colour, VS2 clarity, Excellent cut

Natural$4,500 - $7,000
Lab-Grown$1,200 - $2,500

Save $3,000 - $4,500 with lab-grown

2-Carat Round Brilliant

G colour, VS2 clarity, Excellent cut

Natural$14,000 - $22,000
Lab-Grown$3,000 - $6,000

Save $11,000 - $16,000 with lab-grown

Price trend

  • -Lab-grown prices have dropped 30-50% over the past three years as production has scaled
  • -Natural diamond prices have been relatively stable
  • -The gap continues to widen as lab production costs decrease

Quality Comparison

Side by side, the specs are identical. There is no quality difference.

PropertyLab-GrownNatural
Chemical compositionCarbon (C)Carbon (C)
Crystal structureCubic (diamond lattice)Cubic (diamond lattice)
Hardness (Mohs)1010
Refractive index2.417-2.4192.417-2.419
BrillianceIdenticalIdentical
Fire (dispersion)IdenticalIdentical
DurabilityIdenticalIdentical
InclusionsPossible (different types)Possible
CertificationGIA, IGI, GCALGIA, IGI, GCAL

A D-colour, VVS1 lab-grown diamond and a D-colour, VVS1 natural diamond look and perform identically. The grading is the same. The sparkle is the same.

The Resale Value Question

This is where the two types genuinely differ. Here is the honest picture.

Natural Resale
  • -Retain approximately 30-50% of retail price on resale
  • -Rare or exceptional stones hold value better
  • -Well-established secondary market through dealers and consignment
Lab-Grown Resale
  • -Resale value is currently very low (10-20% of purchase price)
  • -As prices fall, older lab-grown stones become worth less than new ones
  • -No established secondary market yet; some trade-in programmes exist

The reframe: If you view a diamond as an investment, natural is the safer choice. If you view it as a purchase (like a car or a holiday), lab-grown gives you more for your money. Most engagement rings are never resold. The question is: are you buying a stone or an asset?

Ethical and Environmental Comparison

Neither option is perfectly ethical or perfectly green. Here is a balanced view.

Lab-Grown

  • +No mining, no community displacement
  • +No conflict diamond concerns
  • ~Energy-intensive production, especially HPHT
  • ~Carbon footprint varies by facility and energy source
  • +Some producers use 100% renewable energy

Natural

  • +Provides employment in Botswana, Russia, Canada, Australia
  • ~Kimberley Process has reduced (not eliminated) conflict diamonds
  • -Significant environmental impact from mining
  • ~Major miners have sustainability programmes

Lab-grown avoids mining concerns but requires significant energy. Natural diamonds support mining economies but involve environmental disruption. Do your research on specific producers if ethics are a primary factor in your decision.

Can You Tell Them Apart?

No.

Lab-grown and natural diamonds are indistinguishable to the naked eye. Even professional jewellers need specialised equipment like a DiamondView machine to tell them apart.

No visual test can distinguish lab-grown from natural diamonds
Professional jewellers cannot tell the difference without specialised equipment
Lab-grown may have different inclusion types (metallic flux in HPHT) visible only under 10x magnification
GIA reports indicate "laboratory-grown" on the certificate
A laser inscription on the girdle typically identifies lab-grown stones

Price Comparison Calculator

Choose your specs below to see estimated prices for both lab-grown and natural diamonds.

0.3ct5.0ct
Natural Diamond

$5,150 - $6,950

1.0ct Round Brilliant, G colour, VS2 clarity, Excellent cut

Formed over billions of years. Holds resale value.

Lab-Grown Diamond

$1,800 - $2,450

1.0ct Round Brilliant, G colour, VS2 clarity, Excellent cut

Created in weeks. Chemically identical. Lower resale.

You save by choosing lab-grown

$3,900 (64% less)

Same budget buys a lab-grown

2.1ct diamond

Your $3,900 saving could cover the setting, wedding band, and a honeymoon upgrade.

Decision Guide

A values-based framework to help you decide.

Choose lab-grown if:

  • You want the most diamond for your budget
  • Resale value is not a priority
  • You are comfortable with manufactured luxury goods
  • Your partner does not have a strong preference for natural

Choose natural if:

  • The “billions of years in the making” story matters to you
  • You want the option to resell or pass down as a legacy piece
  • You are buying as an investment or store of value
  • Tradition and cultural significance are important

Buying tips: lab-grown

  • -Prioritise Cut quality above all else
  • -You can afford higher colour and clarity for the same budget
  • -Consider IGI certification (more common for lab-grown)
  • -Shop online (James Allen, Brilliant Earth, Ritani) for best prices
  • -Do not overpay: lab-grown margins vary wildly between retailers

Buying tips: natural

  • -Prioritise Cut, then Carat for visual impact
  • -G-H colour and VS2-SI1 clarity are the sweet spots
  • -Always buy GIA-certified
  • -Check for fluorescence (can lower price, usually invisible to eye)
  • -Consider slightly under benchmark sizes (0.9ct vs 1.0ct) for 15-20% savings

Other alternatives to consider

Moissanite

$400-$600 per carat. Nearly as hard as diamond. More fire and rainbow effect. A good option if budget is the primary concern.

White Sapphire

Much less sparkle than diamond. Not recommended as a diamond alternative for engagement rings.

Vintage Diamonds

Natural diamonds at 30-50% below retail. Sustainable (recycled) and unique. Available through estate sales and specialists.

The conversation to have

The best advice is to have an honest conversation with your partner. Many couples discuss this together. There is no wrong answer.

Frequently Asked Questions

Are lab-grown diamonds real diamonds?
Yes. Lab-grown diamonds are chemically, physically, and optically identical to natural diamonds. They are made of pure carbon in a cubic crystal structure, graded by the same labs (GIA, IGI) using the same 4C system. They are not simulants like cubic zirconia or moissanite.
How much cheaper are lab-grown diamonds?
Lab-grown diamonds currently cost 50-70% less than comparable natural diamonds. A 1-carat round brilliant G/VS2 natural diamond costs $4,500-$7,000, while the same specs in lab-grown cost $1,200-$2,500. The gap continues to widen as production scales.
Can a jeweller tell the difference?
No. A professional jeweller cannot distinguish between lab-grown and natural diamonds with the naked eye or a standard loupe. Specialised equipment such as a DiamondView machine is required. Both types look identical and test as diamond on standard testers.
Do lab-grown diamonds hold their value?
Lab-grown diamonds currently have low resale value, typically 10-20% of the purchase price. As production scales and prices fall, older stones become worth less than newly produced ones. Natural diamonds retain approximately 30-50% of retail price on resale.
What is the difference between HPHT and CVD?
HPHT (High Pressure High Temperature) mimics natural diamond formation using extreme pressure and heat. CVD (Chemical Vapour Deposition) grows diamonds from carbon-rich gas in a vacuum chamber. Both produce genuine diamonds. CVD is more common for larger stones and tends to produce higher clarity.
Are lab-grown diamonds more ethical?
Neither option is perfectly ethical. Lab-grown avoids mining concerns (displacement, conflict diamonds) but requires significant energy. Natural mining provides employment in countries like Botswana and Canada. The Kimberley Process has reduced but not eliminated conflict diamonds. Research specific producers if ethics are your primary concern.
What should I prioritise when buying?
Cut quality is the most important factor for both types, as it determines sparkle. For lab-grown, you can afford higher colour and clarity for the same budget. For natural, G-H colour and VS2-SI1 clarity are the sweet spots. Always buy certified (GIA or IGI).
Will lab-grown diamond prices keep falling?
Lab-grown prices have dropped 30-50% over the past three years and the trend is expected to continue. As manufacturing technology improves and more producers enter the market, prices are likely to fall further. Natural diamond prices have remained relatively stable.