Round|Lab Grown|IGI

12.55ct E VS2 Round Lab Grown Diamond

EX • E/VS2 • IGI LG788637051

Shape and cutting style on the report: Round brilliant

Certificate IGI LG788637051

Diamond specifications and retailer prices

From £2,942 GBP

HK$30,800 HKD

As of October 31, 2026

Save £17,007 GBP (85%) vs most expensive(unlock to see where)

17 retailers carry this diamond

Most expensive: £19,949 GBP at Brilliant Earth · As of October 31, 2026

View at Brilliant Earth

About this 12.55ct lab-grown round diamond

This 12.55ct lab-grown round sits in the over five carat band, graded E colour (colourless) and VS2 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG788637051 or 788637051. Listed at 17 retailers as of October 31, 2026, with prices from £2,942 to £19,949, a £17,007 spread on the same certified stone. Brilliant Earth lists it at £19,949. 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

12.55

Carat

Colour

VS2

Clarity

Excellent

Cut

Specifications

CutExcellent

PolishExcellent

SymmetryExcellent

FluorescenceNone

Crown angle32.4°

Pavilion angle40.7°

OriginLab Grown

Grading LabIGI

CertificateIGI LG788637051

Dimensions15.09 × 15.16 × 8.91 mm

L/W Ratio1.00

Girdle conditionFaceted

Culet sizePointed

Cert comments

This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa

View IGI Report →View Loupe360 Video →

Top View

OriginLab Grown

CutExcellent

PolishExcellent

SymmetryExcellent

FluorescenceNone

CertificateIGI LG788637051

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 31

Current: £19,949 GBP|Low: £2,438 GBP|High: £19,949 GBP|Avg: £5,761 GBP

Brilliant Earth

Retailer 2

Retailer 3

Retailer 4

Retailer 5

Retailer 6

Retailer 7

Retailer 8

Retailer 9

Retailer 10

Retailer 11

Retailer 12

Retailer 13

Retailer 14

Retailer 15

Retailer 16

November 1, 2026

Retailer 8£2,438 GBP

Retailer 4£2,477 GBP

Retailer 7£2,599 GBP

Retailer 12£2,942 GBP

Retailer 11£3,248 GBP

Retailer 13£3,291 GBP

Retailer 14£3,433 GBP

Retailer 10£3,834 GBP

Retailer 16£3,988 GBP

Retailer 3£4,425 GBP

Retailer 6£4,661 GBP

Retailer 5£6,445 GBP

Retailer 15£7,557 GBP

Retailer 2£8,612 GBP

Retailer 9£12,579 GBP

Brilliant Earth£19,949 GBP

34 data points across 16 retailers

17 retailers£2,942 GBP to £19,949 GBP

Retailer 1

£2,240 GBP

$3,002 USD

Price last confirmed 21 days ago

Retailer 2

£2,438 GBP

$3,266 USD

View

Price last confirmed 18 days ago

Retailer 3

£2,599 GBP

$3,482 USD

View

Price last confirmed 15 days ago

Retailer 4

£2,942 GBP

HK$30,800 HKD

View

Retailer 5

£3,247 GBP

$4,351 USD

View

Price last confirmed 22 days ago

Retailer 6

£3,248 GBP

$4,352 USD

View

Retailer 7

£3,291 GBP

$4,410 USD

View

Retailer 8

£3,433 GBP

View

Retailer 9

£3,834 GBP

€4,893 EUR

View

Retailer 10

£3,988 GBP

$5,344 USD

View

Retailer 11

£4,425 GBP

View

Retailer 12

£4,661 GBP

$6,245 USD

View

Price last confirmed 14 days ago

B+

Retailer 13

£6,445 GBP

$8,636 USD

View

B+

Retailer 14

£7,557 GBP

$10,126 USD

View

Retailer 15

£8,612 GBP

SGD 15,594 SGD

View

Retailer 16

£12,579 GBP

$16,854 USD

View

Most Expensive

Brilliant Earth

18572424A · Oct 31

£19,949 GBP

$26,730 USD

View

16 more retailers have this diamond

Prices start from £2,942 GBPSave up to £17,007 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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12.55ct Round

£2,942 GBP