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Radiant|Lab Grown|IGI

1.28ct E VVS1 Radiant Lab Grown Diamond

ID • E/VVS1 • IGI LG841654543

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

Certificate IGI LG841654543

Diamond specifications and retailer prices

From £140 GBP
$187 USD
As of October 27, 2026
Save £681 GBP (83%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: £1,277 GBP at Helzberg Diamonds · As of October 13, 2026
View at Helzberg Diamonds

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 LG841654543 or 841654543. Listed at 21 retailers as of October 26, 2026, with a 485% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle40.6°
Pavilion angle35.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG841654543
Dimensions8.21 × 5.18 × 3.45 mm
L/W Ratio1.58
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
8.21 mm5.18 mm1.28 ctE / VVS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG841654543
Side View
Table 67.0%Crown 40.6°Girdle: MED-STKPavilion 35.9°Culet: NoneDepth 66.6%

Caratlytics Score

How it works →
A+
Exceptional
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 27
Current: £316 GBP|Low: £140 GBP|High: £859 GBP|Avg: £407 GBP|-1.9%
Retailer 1
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Retailer 20
October 29, 2026
Retailer 20£140 GBP
Retailer 14£158 GBP
Retailer 9£164 GBP
Retailer 12£174 GBP
Retailer 6£176 GBP
Retailer 15£215 GBP
Retailer 5£237 GBP
Retailer 11£290 GBP
Retailer 19£300 GBP
Retailer 1£316 GBP
Retailer 8£419 GBP
Retailer 3£428 GBP
Retailer 18£455 GBP
Retailer 16£561 GBP
Retailer 4£566 GBP
Retailer 10£572 GBP
Retailer 17£585 GBP
Retailer 2£602 GBP
Retailer 13£680 GBP
Retailer 7£821 GBP

16 data points across 20 retailers

21 retailers£140 GBP to £821 GBP

A+
Cheapest Retailer
-
£140 GBP
$187 USD
A
Retailer 2
-
£158 GBP
$210 USD
View
Final sale: no returns
A
Retailer 3
-
£164 GBP
$219 USD
View
A
Retailer 4
-
£174 GBP
$232 USD
View
A
Retailer 5
-
£176 GBP
$234 USD
View
A
Retailer 6
-
£215 GBP
View
B+
Retailer 7
-
£237 GBP
$315 USD
View
A
Retailer 8
-
£290 GBP
€368 EUR
View
A
Retailer 9
-
£300 GBP
ZAR 6,448 ZAR
View
A
Retailer 10
-
£316 GBP
View
A
Retailer 11
-
£419 GBP
$558 USD
View
A
Retailer 12
-
£428 GBP
A$877 AUD
View
B+
Retailer 13
-
£455 GBP
$606 USD
View
B+
Retailer 14
-
£561 GBP
$747 USD
View
B+
Retailer 15
-
£566 GBP
$754 USD
View
B+
Retailer 16
-
£572 GBP
SGD 1,029 SGD
View
B+
Retailer 17
-
£585 GBP
$779 USD
View
B+
Retailer 18
-
£602 GBP
$801 USD
View
Retailer 19
-
£680 GBP
$905 USD
View
Price last confirmed 8 days ago
B+
Retailer 20
-
£821 GBP
View
Most Expensive
Helzberg Diamonds
ZXZOKHMLKLKJ · Oct 13
£1,277 GBP
$1,700 USD
View
Price last confirmed 16 days ago
20 more retailers have this diamond
Prices start from £140 GBPSave up to £681 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
£140 GBP