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Radiant|Lab Grown|IGI

1.28ct E VVS1 Radiant Lab Grown Diamond

EX • E/VVS1 • IGI LG651420471

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

Certificate IGI LG651420471

Diamond specifications and retailer prices

From £178 GBP
$237 USD
As of October 28, 2026
Save £896 GBP (83%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: £1,074 GBP at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

About this 1.28ct lab-grown radiant diamond

This 1.28ct lab-grown radiant sits in the one-and-a-quarter to one-and-a-half carat band, graded E colour (colourless) and VVS1 clarity (very-very-slightly-included), with a top-tier cut grade and certified by IGI LG651420471 or 651420471. Listed at 19 retailers as of October 28, 2026, with prices from £178 to £1,074, a £896 spread on the same certified stone. Brilliant Earth lists it at £1,074. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.28
Carat
E
Colour
VVS1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle44.1°
Pavilion angle34.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG651420471
Dimensions7.67 × 5.33 × 3.61 mm
L/W Ratio1.44
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.67 mm5.33 mm1.28 ctE / VVS1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG651420471
Side View
Table 65.0%Crown 44.1°Girdle: MediumPavilion 34.4°Culet: NoneDepth 67.7%

Caratlytics Score

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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: Oct 28
Current: £1,074 GBP|Low: £178 GBP|High: £1,149 GBP|Avg: £497 GBP|-6.5%
Brilliant Earth
Retailer 2
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Retailer 19
October 29, 2026
Retailer 3£178 GBP
Retailer 6£185 GBP
Retailer 7£194 GBP
Retailer 19£197 GBP
Retailer 18£243 GBP
Retailer 4£339 GBP
Retailer 13£339 GBP
Retailer 2£364 GBP
Retailer 17£365 GBP
Retailer 8£438 GBP
Retailer 9£463 GBP
Retailer 14£482 GBP
Retailer 15£636 GBP
Retailer 16£668 GBP
Retailer 11£674 GBP
Retailer 10£721 GBP
Retailer 12£794 GBP
Retailer 5£924 GBP
Brilliant Earth£1,074 GBP

38 data points across 19 retailers

19 retailers£178 GBP to £1,074 GBP

A
Cheapest Retailer
-
£178 GBP
$237 USD
Final sale: no returns
A
Retailer 2
-
£185 GBP
$246 USD
View
Price last confirmed 32 days ago
A
Retailer 3
-
£194 GBP
$259 USD
View
Price last confirmed 32 days ago
A
Retailer 4
-
£197 GBP
$263 USD
View
A
Retailer 5
-
£197 GBP
$263 USD
View
Price last confirmed 17 days ago
A
Retailer 6
-
£243 GBP
View
Price last confirmed 12 days ago
A
Retailer 7
-
£339 GBP
$451 USD
View
A
Retailer 8
-
£339 GBP
ZAR 7,286 ZAR
View
A
Retailer 9
-
£364 GBP
View
A
Retailer 10
-
£365 GBP
€463 EUR
View
B+
Retailer 11
-
£438 GBP
$583 USD
View
B+
Retailer 12
-
£463 GBP
$616 USD
View
B+
Retailer 13
-
£482 GBP
A$987 AUD
View
B+
Retailer 14
-
£636 GBP
$847 USD
View
B+
Retailer 15
-
£668 GBP
$890 USD
View
Price last confirmed 8 days ago
B
Retailer 16
-
£674 GBP
$897 USD
View
B
Retailer 17
-
£794 GBP
View
B
Retailer 18
-
£924 GBP
$1,231 USD
View
Most Expensive
B
Brilliant Earth
12197745A · Oct 29
£1,074 GBP
$1,430 USD
View
18 more retailers have this diamond
Prices start from £178 GBPSave up to £896 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
1.28ct Radiant
£178 GBP