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Radiant|Lab Grown|IGI

15.09ct F VS1 Radiant Lab Grown Diamond

EX • F/VS1 • IGI LG758559978

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

Certificate IGI LG758559978

Diamond specifications and retailer prices

From £1,680 GBP
As of November 2, 2026
Save £9,618 GBP (85%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: £11,297 GBP at Brilliant Earth · As of November 2, 2026
View at Brilliant Earth

About this 15.09ct lab-grown radiant diamond

This 15.09ct 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 LG758559978 or 758559978. Listed at 19 retailers as of November 2, 2026, with prices from £1,680 to £11,297, a £9,618 spread on the same certified stone. Brilliant Earth lists it at £11,297. 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

15.09
Carat
F
Colour
VS1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle23.9°
Pavilion angle32.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG758559978
Dimensions12.40 × 12.40 × 7.95 mm
L/W Ratio1.00
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
12.40 mm12.40 mm15.09 ctF / VS1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG758559978
Side View
Table 61.0%Crown 23.9°Girdle: Slightly ThickPavilion 32.5°Culet: NoneDepth 64.1%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 2
Current: £11,297 GBP|Low: £1,680 GBP|High: £11,647 GBP|Avg: £5,423 GBP|-3.0%
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
Retailer 17
Retailer 18
Retailer 19
November 2, 2026
Retailer 12£1,680 GBP
Retailer 14£1,961 GBP
Retailer 9£2,019 GBP
Retailer 16£2,091 GBP
Retailer 5£2,515 GBP
Retailer 3£2,847 GBP
Retailer 13£2,857 GBP
Retailer 18£2,875 GBP
Retailer 2£3,041 GBP
Retailer 11£3,158 GBP
Retailer 4£3,238 GBP
Retailer 19£3,340 GBP
Retailer 15£3,875 GBP
Retailer 10£4,825 GBP
Retailer 7£5,880 GBP
Retailer 8£7,300 GBP
Retailer 17£8,024 GBP
Retailer 6£10,652 GBP
Brilliant Earth£11,297 GBP

28 data points across 19 retailers

19 retailers£1,680 GBP to £11,297 GBP

A
Cheapest Retailer
-
£1,680 GBP
A
Retailer 2
-
£1,961 GBP
$2,632 USD
View
A
Retailer 3
-
£2,019 GBP
$2,709 USD
View
Final sale: no returns
A
Retailer 4
-
£2,091 GBP
$2,806 USD
View
A
Retailer 5
-
£2,515 GBP
$3,375 USD
View
A
Retailer 6
-
£2,847 GBP
$3,820 USD
View
A
Retailer 7
-
£2,857 GBP
View
A
Retailer 8
-
£2,875 GBP
$3,858 USD
View
A
Retailer 9
-
£3,041 GBP
$4,081 USD
View
B+
Retailer 10
-
£3,158 GBP
$4,238 USD
View
A
Retailer 11
-
£3,238 GBP
ZAR 70,188 ZAR
View
A
Retailer 12
-
£3,340 GBP
€4,269 EUR
View
B+
Retailer 13
-
£3,875 GBP
A$8,000 AUD
View
Retailer 14
-
£4,825 GBP
$6,475 USD
View
Price last confirmed 14 days ago
B+
Retailer 15
-
£5,880 GBP
$7,891 USD
View
B
Retailer 16
-
£7,300 GBP
$9,797 USD
View
B
Retailer 17
-
£8,024 GBP
A$16,566 AUD
View
B
Retailer 18
-
£10,652 GBP
$14,295 USD
View
Most Expensive
B
Brilliant Earth
18212470A · Nov 2
£11,297 GBP
$15,160 USD
View
18 more retailers have this diamond
Prices start from £1,680 GBPSave up to £9,618 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
15.09ct Radiant
£1,680 GBP