High quality laboratory-grown diamonds look and feel like naturally mined diamonds, are difficult to grow and are rare

Round Brilliant Cut 0.50 Carat

Choose from yellow, white or rose 18K gold smooth plain shoulders. Featuring 0.50 carat IGI certified F/VS1 lab diamond in a classic six prong setting.

F/VS1 From £1,495

Round Brilliant Cut 1.00 Carat

Choose from yellow, white or rose 18K gold smooth plain shoulders. Featuring 1.00 carat IGI certified F/VS1 lab diamond in a classic six prong setting.

F/VS1 From £2,985

Oval Cut 1.00 Carat

Contemporary oval cut 1.00 carat lab grown IGI certified solitaire diamond ring in 18K white gold or 950 platinum setting. Full and half sizes.

F/VVS1 From £3,175

Cushion Cut 1.00 Carat

Fashionable cushion cut IGI certified 1.00 carat cushion cut diamond solitaire ring in 18K white gold or 950 platinum setting. Request sample at home.

F/VS1 From £2,485

All our lab grown diamond rings are "PM" hallmarked, IGI or GIA certficated and include personalisation


  • Lab diamonds are diamonds grown under laboratory conditions using tiny natural diamonds as their embryo

    Also referred to as synthetic or artficial diamonds, but have essentially the same chemical composition, crystal structure and optical properties as a mined diamond.

    Lab grown diamonds are NOT diamond simulants, which are products that imitate the appearance of diamonds without a similar chemical composition.

  • Lab diamonds look and feel like natural diamonds and just like natural diamonds they vary in colour, clarity and weight

  • Lab diamonds represent a more sustainable and environmentally ethical choice

  • Pobjoy lab diamonds are all certified by the IGI or GIA which are currently the only recognised and reliable laboratory grown diamond grading institutes

  • Lab diamond production involves high cost sophisticated equipment and highly skilled specialists

  • Each IGI certified lab grown diamond includes the certificate number nano inscribed on the girdle of the diamond

  • Because they are of the same composition as naturally mined diamonds, they pass the same industry standard thermal and elctrical testing techniques

  • Lab diamonds are significantly less expensive than natural diamonds especially in the case of higher grade larger carat weights

  • Although the choice of high quality lab diamonds is limited it is steadily increasing

High Quality Laboratory Diamonds Are Difficult To Grow And Are Rare

Just like in the mined diamond industry, there are two completely different supplies of lab diamonds: high quality and low quality. Most of what is on the market is low quality and not certified by a recognised grading institute.

Pobjoy Diamonds only source certified, high quality lab diamonds that took significantly longer to grow than their lower quality counterparts.

Why Is it Difficult To Grow High Quality Laboratory Diamonds?

There is a well-known speed limit as to how fast a diamond crystal can be grown. If you try to grow a diamond faster, the diamonds will have fractures in the crystal resulting in low-clarity. Hot, fast growth also produces more voids in the crystal structure which results in brown, yellow, and grey undertones.

The cost of cutting and polishing a rough diamond into a diamond gemstone is A) significant and B) exactly the same for both grown and mined diamonds. Diamond is the hardest naturally occurring material on earth, and it can only be cut and polished by other diamonds or multi-million dollar laser tools.

A general lack of knowledge about lab grown diamonds has led to the emergence of numerous "alternative facts". Some examples of these include a limited resale ability of lab diamonds (false), that lab diamonds change colour over time (they don’t), or that lab diamonds actually use more energy than strip mining the earth (they don’t).

Grading Certification

Every laboratory-grown diamond we supply is certified by the International Gemological Institute (IGI) or the Gemological Institute of America (GIA), the benchmarks for laboratory-grown diamond grading.

A different report is issued for synthetic diamonds than for mined diamonds by each grading institute. IGI laboratory reports are yellow or white rather than blue.

GIA reports include a navy blue header rather than beige and white.

Laboratory-grown diamonds present an exciting opportunity for customers to get a bigger diamond at a lower price point.

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Laboratory-grown diamonds are referred to here variously as lab diamonds, laboratory diamonds, synthetic diamonds and artificial diamonds with each term havng the same meaning.

IGI & GIA Certified Laboratory Grown Diamonds

Because Not All Diamonds Are Created Equal