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Radiant|Lab Grown|IGI

12.39ct F VS1 Radiant Lab Grown Diamond

EX • F/VS1 • IGI LG743507511

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

Certificate IGI LG743507511

Diamond specifications and retailer prices

From £1,789 GBP
$2,397 USD
As of November 2, 2026
Save £10,518 GBP (85%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: £17,524 GBP at Brilliant Earth · As of October 31, 2026
View at Brilliant Earth

About this 12.39ct lab-grown radiant diamond

This 12.39ct lab-grown radiant sits in the over five carat band, graded F colour (colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG743507511 or 743507511. Listed at 12 retailers as of November 2, 2026, with a 588% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

12.39
Carat
F
Colour
VS1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle46.1°
Pavilion angle34.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG743507511
Dimensions11.37 × 11.37 × 7.60 mm
L/W Ratio1.00
Culet sizePointed
Top View
11.37 mm11.37 mm12.39 ctF / VS1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG743507511
Side View
Table 65.0%Crown 46.1°Girdle: MediumPavilion 34.9°Culet: NoneDepth 66.8%

Caratlytics Score

How it works →
A
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: Nov 2
Current: £3,464 GBP|Low: £1,525 GBP|High: £12,307 GBP|Avg: £3,935 GBP|+0.2%
Retailer 1
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
Retailer 17
November 2, 2026
Retailer 3£1,525 GBP
Retailer 10£1,840 GBP
Retailer 9£2,130 GBP
Retailer 4£2,197 GBP
Retailer 7£2,285 GBP
Retailer 13£2,478 GBP
Retailer 16£2,915 GBP
Retailer 17£2,978 GBP
Retailer 5£3,037 GBP
Retailer 2£3,111 GBP
Retailer 1£3,464 GBP
Retailer 11£4,244 GBP
Retailer 8£4,832 GBP
Retailer 6£5,156 GBP
Retailer 14£5,812 GBP
Retailer 12£6,841 GBP
Retailer 15£12,307 GBP

11 data points across 17 retailers

12 retailers£1,789 GBP to £12,307 GBP

A
Cheapest Retailer
-
£1,789 GBP
$2,397 USD
A
Retailer 2
-
£1,840 GBP
View
A
Retailer 3
-
£2,478 GBP
$3,320 USD
View
A
Retailer 4
-
£2,915 GBP
$3,906 USD
View
A
Retailer 5
-
£2,978 GBP
$3,990 USD
View
B+
Retailer 6
-
£3,111 GBP
$4,169 USD
View
B+
Retailer 7
-
£3,464 GBP
€4,420 EUR
View
B+
Retailer 8
-
£4,244 GBP
A$8,749 AUD
View
B
Retailer 9
-
£5,812 GBP
$7,787 USD
View
B
Retailer 10
-
£6,841 GBP
A$14,102 AUD
View
B
Retailer 11
-
£12,307 GBP
$16,490 USD
View
Most Expensive
Brilliant Earth
22300729A · Oct 31
£17,524 GBP
$23,480 USD
View
Price under review
11 more retailers have this diamond
Prices start from £1,789 GBPSave up to £10,518 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.

A
12.39ct Radiant
£1,789 GBP