Radiant|Lab Grown|IGI

12.56ct G VS1 Radiant Lab Grown Diamond

ID • G/VS1 • IGI LG603334337

Shape and cutting style on the report: Cut cornered rectangular modified brilliant

Certificate IGI LG603334337

Diamond specifications and retailer prices

From £3,015 GBP

$4,040 USD

As of October 30, 2026

Save £12,210 GBP (80%) vs most expensive(unlock to see where)

20 retailers carry this diamond

Most expensive: £15,225 GBP at Brilliant Earth · As of October 31, 2026

View at Brilliant Earth

About this 12.56ct lab-grown radiant diamond

This 12.56ct lab-grown radiant sits in the over five carat band, graded G colour (near-colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG603334337 or 603334337. Listed at 20 retailers as of October 30, 2026, with prices from £3,015 to £15,225, a £12,210 spread on the same certified stone. Brilliant Earth lists it at £15,225. 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

12.56

Carat

Colour

VS1

Clarity

Ideal

Cut

Specifications

CutIdeal

PolishExcellent

SymmetryExcellent

FluorescenceNone

Crown angle45.3°

Pavilion angle37.8°

OriginLab Grown

Grading LabIGI

CertificateIGI LG603334337

Dimensions14.83 × 12.00 × 8.25 mm

L/W Ratio1.24

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 LG603334337

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 30

Current: £15,225 GBP|Low: £2,894 GBP|High: £15,225 GBP|Avg: £5,636 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

November 2, 2026

Retailer 11£3,015 GBP

Retailer 3£3,376 GBP

Retailer 12£3,497 GBP

Retailer 8£3,500 GBP

Retailer 13£3,573 GBP

Retailer 2£4,556 GBP

Retailer 9£4,638 GBP

Retailer 4£4,902 GBP

Retailer 7£5,413 GBP

Retailer 10£5,416 GBP

Retailer 6£6,577 GBP

Retailer 5£8,868 GBP

Brilliant Earth£15,225 GBP

43 data points across 13 retailers

20 retailers£3,015 GBP to £15,225 GBP

Cheapest Retailer

£3,015 GBP

$4,040 USD

Retailer 2

£3,160 GBP

$4,234 USD

View

Retailer 3

£3,376 GBP

$4,523 USD

View

Final sale: no returns

B+

Retailer 4

£3,497 GBP

$4,686 USD

View

Retailer 5

£3,497 GBP

$4,686 USD

View

Price last confirmed 20 days ago

B+

Retailer 6

£3,500 GBP

$4,690 USD

View

B+

Retailer 7

£3,573 GBP

$4,787 USD

View

B+

Retailer 8

£4,127 GBP

HK$43,200 HKD

View

B+

Retailer 9

£4,371 GBP

$5,856 USD

View

B+

Retailer 10

£4,556 GBP

View

B+

Retailer 11

£4,638 GBP

$6,215 USD

View

B+

Retailer 12

£4,902 GBP

View

B+

Retailer 13

£5,413 GBP

ZAR 117,171 ZAR

View

B+

Retailer 14

£5,416 GBP

$7,257 USD

View

Retailer 15

£6,577 GBP

$8,813 USD

View

Retailer 16

£7,324 GBP

$9,813 USD

View

Retailer 17

£8,868 GBP

$11,882 USD

View

Price last confirmed 20 days ago

Retailer 18

£9,714 GBP

$13,015 USD

View

Retailer 19

£12,416 GBP

$16,636 USD

View

Most Expensive

Brilliant Earth

10597375A · Oct 31

£15,225 GBP

$20,400 USD

View

19 more retailers have this diamond

Prices start from £3,015 GBPSave up to £12,210 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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