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Radiant|Lab Grown|IGI

4.51ct D VS1 Radiant Lab Grown Diamond

ID • D/VS1 • IGI LG839647920

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

Certificate IGI LG839647920

Diamond specifications and retailer prices

From £783 GBP
HK$8,200 HKD
As of October 30, 2026
Save £2,978 GBP (79%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: £3,762 GBP at Rare Carat · As of October 28, 2026
View at Rare Carat

About this 4.51ct lab-grown radiant diamond

This 4.51ct lab-grown radiant sits in the three to five carat band, graded D colour (colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG839647920 or 839647920. Listed at 17 retailers as of October 28, 2026, with prices from £783 to £3,762, a £2,978 spread on the same certified stone. Rare Carat lists it at £3,762. 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

4.51
Carat
D
Colour
VS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle44.2°
Pavilion angle32.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG839647920
Dimensions12.11 × 8.00 × 5.28 mm
L/W Ratio1.51
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
12.11 mm8.00 mm4.51 ctD / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG839647920
Side View
Table 61.0%Crown 44.2°Girdle: MediumPavilion 32.4°Culet: NoneDepth 66.0%

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: Oct 30
Current: £3,762 GBP|Low: £649 GBP|High: £3,803 GBP|Avg: £1,722 GBP|-1.1%
Rare Carat
Retailer 2
Retailer 3
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Retailer 8
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Retailer 10
Retailer 11
Retailer 12
Retailer 13
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Retailer 15
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Retailer 18
October 27, 2026
Retailer 8£649 GBP
Retailer 5£649 GBP
Retailer 13£783 GBP
Retailer 6£802 GBP
Retailer 15£1,017 GBP
Retailer 2£1,025 GBP
Retailer 17£1,086 GBP
Retailer 12£1,418 GBP
Retailer 14£1,440 GBP
Retailer 16£1,599 GBP
Retailer 7£1,834 GBP
Retailer 18£2,159 GBP
Retailer 9£2,262 GBP
Retailer 3£2,273 GBP
Retailer 4£2,323 GBP
Retailer 11£2,524 GBP
Retailer 10£3,208 GBP
Rare Carat£3,762 GBP

20 data points across 18 retailers

17 retailers£783 GBP to £3,762 GBP

Retailer 1
-
£649 GBP
Price last confirmed 22 days ago
A
Retailer 2
-
£783 GBP
HK$8,200 HKD
View
A
Retailer 3
-
£802 GBP
$1,075 USD
View
Retailer 4
-
£1,017 GBP
€1,298 EUR
View
Price last confirmed 7 days ago
A
Retailer 5
-
£1,025 GBP
View
A
Retailer 6
-
£1,086 GBP
$1,455 USD
View
A
Retailer 7
-
£1,418 GBP
ZAR 30,695 ZAR
View
Retailer 8
-
£1,440 GBP
A$2,968 AUD
View
Price last confirmed 9 days ago
B+
Retailer 9
-
£1,599 GBP
$2,143 USD
View
B+
Retailer 10
-
£1,834 GBP
$2,458 USD
View
B+
Retailer 11
-
£2,159 GBP
$2,893 USD
View
B+
Retailer 12
-
£2,262 GBP
SGD 4,095 SGD
View
B+
Retailer 13
-
£2,273 GBP
$3,046 USD
View
B+
Retailer 14
-
£2,323 GBP
$3,113 USD
View
B+
Retailer 15
-
£2,524 GBP
View
B
Retailer 16
-
£3,208 GBP
$4,298 USD
View
Most Expensive
B
Rare Carat
172691-BB · Oct 28
£3,762 GBP
$5,040 USD
View
16 more retailers have this diamond
Prices start from £783 GBPSave up to £2,978 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
4.51ct Radiant
£783 GBP