Round|Lab Grown|IGI

6.31ct H VS2 Round Lab Grown Diamond

ID • H/VS2 • IGI LG581318516

Shape and cutting style on the report: Round brilliant

Certificate IGI LG581318516

Diamond specifications and retailer prices

From £708 GBP

$948 USD

As of October 29, 2026

Save £2,541 GBP (78%) vs most expensive(unlock to see where)

16 retailers carry this diamond

Most expensive: £3,248 GBP at Blue Nile · As of October 29, 2026

View at Blue Nile

About this 6.31ct lab-grown round diamond

This 6.31ct lab-grown round sits in the over five carat band, graded H colour (near-colourless) and VS2 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG581318516 or 581318516. Listed at 16 retailers as of October 29, 2026, with prices from £708 to £3,248, a £2,541 spread on the same certified stone. Blue Nile lists it at £3,248. Lab-grown prices in the 2ct and up range have fallen 40 to 60% over the last 18 months. Use the cross-retailer spread above to find the lowest current listing.

The 4Cs

6.31

Carat

Colour

VS2

Clarity

Ideal

Cut

Specifications

CutIdeal

PolishExcellent

SymmetryExcellent

FluorescenceNone

Crown angle35°

Pavilion angle41°

OriginLab Grown

Grading LabIGI

CertificateIGI LG581318516

Dimensions11.83 × 11.74 × 7.34 mm

L/W Ratio1.01

Girdle conditionFaceted

Culet sizePointed

Cert comments

This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa

View IGI Report →View Loupe360 Video →

Top View

OriginLab Grown

CutIdeal

PolishExcellent

SymmetryExcellent

FluorescenceNone

CertificateIGI LG581318516

Side View

Caratlytics Score

How it works →

Excellent

Excellent quality and great value

Unlock full score analysis

See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 29

Current: £3,248 GBP|Low: £472 GBP|High: £3,336 GBP|Avg: £1,579 GBP|+0.0%

Blue Nile

Retailer 2

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October 29, 2026

Retailer 9£661 GBP

Retailer 3£708 GBP

Retailer 12£769 GBP

Retailer 14£821 GBP

Retailer 16£821 GBP

Retailer 17£1,168 GBP

Retailer 4£1,175 GBP

Retailer 2£1,179 GBP

Retailer 15£1,227 GBP

Retailer 6£1,313 GBP

Retailer 5£1,694 GBP

Retailer 13£1,769 GBP

Retailer 18£2,308 GBP

Retailer 11£2,788 GBP

Retailer 7£2,856 GBP

Retailer 10£3,044 GBP

Retailer 8£3,239 GBP

Blue Nile£3,248 GBP

32 data points across 18 retailers

16 retailers£708 GBP to £3,248 GBP

Cheapest Retailer

£708 GBP

$948 USD

Retailer 2

£769 GBP

$1,031 USD

View

Retailer 3

£821 GBP

$1,100 USD

View

Price last confirmed 13 days ago

Retailer 4

£821 GBP

$1,100 USD

View

B+

Retailer 5

£1,168 GBP

$1,565 USD

View

B+

Retailer 6

£1,175 GBP

$1,575 USD

View

B+

Retailer 7

£1,179 GBP

€1,505 EUR

View

Retailer 8

£1,227 GBP

View

Price last confirmed 13 days ago

B+

Retailer 9

£1,313 GBP

$1,759 USD

View

B+

Retailer 10

£1,694 GBP

$2,270 USD

View

B+

Retailer 11

£1,769 GBP

$2,370 USD

View

Retailer 12

£2,308 GBP

$3,092 USD

View

Retailer 13

£2,788 GBP

View

Retailer 14

£2,856 GBP

$3,827 USD

View

Price last confirmed 12 days ago

Retailer 15

£3,239 GBP

$4,340 USD

View

Most Expensive

Blue Nile

25245800 · Oct 29

£3,248 GBP

$4,352 USD

View

15 more retailers have this diamond

Prices start from £708 GBPSave up to £2,541 GBP

Carat Hunter is not affiliated with, endorsed by, or sponsored by any retailer listed. Retailer information is from publicly available sources and may not be current. Verify details directly with the retailer before purchasing. Return terms as we hold them. Check the retailer's own returns page before you buy.

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6.31ct Round

£708 GBP