Radiant|Lab Grown|IGI

1.28ct E VS1 Radiant Lab Grown Diamond

ID • E/VS1 • IGI LG640443023

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

Certificate IGI LG640443023

Diamond specifications and retailer prices

From £187 GBP
$251 USD
As of October 30, 2026
Save £825 GBP (81%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: £1,012 GBP at Reve Diamonds · As of October 30, 2026
View at Reve 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 VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG640443023 or 640443023. Listed at 18 retailers as of October 30, 2026, with prices from £187 to £1,012, a £825 spread on the same certified stone. Reve Diamonds lists it at £1,012. 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
VS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle38.5°
Pavilion angle31.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG640443023
Dimensions8.00 × 5.35 × 3.56 mm
L/W Ratio1.50
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
8.00 mm5.35 mm1.28 ctE / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG640443023
Side View
Table 63.0%Crown 38.5°Girdle: MED-STKPavilion 31.3°Culet: NoneDepth 66.5%

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: Oct 30
Current: £438 GBP|Low: £180 GBP|High: £1,012 GBP|Avg: £491 GBP|+8.0%
Retailer 1
Retailer 2
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Retailer 6
Retailer 7
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Retailer 10
Retailer 11
Retailer 12
Retailer 13
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Retailer 17
Reve Diamonds
October 31, 2026
Retailer 16£187 GBP
Retailer 9£209 GBP
Retailer 4£217 GBP
Retailer 5£232 GBP
Retailer 17£232 GBP
Retailer 14£351 GBP
Retailer 6£372 GBP
Retailer 3£390 GBP
Retailer 12£399 GBP
Retailer 7£422 GBP
Retailer 1£438 GBP
Retailer 13£565 GBP
Retailer 10£612 GBP
Retailer 15£713 GBP
Retailer 2£746 GBP
Retailer 8£785 GBP
Retailer 11£936 GBP
Reve Diamonds£1,012 GBP

44 data points across 18 retailers

18 retailers£187 GBP to £1,012 GBP

A
Cheapest Retailer
-
£187 GBP
$251 USD
A
Retailer 2
-
£209 GBP
$280 USD
View
Final sale: no returns
A
Retailer 3
-
£217 GBP
$291 USD
View
A
Retailer 4
-
£232 GBP
$311 USD
View
A
Retailer 5
-
£232 GBP
$311 USD
View
A
Retailer 6
-
£351 GBP
$470 USD
View
B+
Retailer 7
-
£372 GBP
$498 USD
View
B+
Retailer 8
-
£390 GBP
$522 USD
View
B+
Retailer 9
-
£399 GBP
ZAR 8,633 ZAR
View
B+
Retailer 10
-
£422 GBP
$565 USD
View
B+
Retailer 11
-
£438 GBP
View
B+
Retailer 12
-
£565 GBP
A$1,165 AUD
View
B+
Retailer 13
-
£612 GBP
$820 USD
View
B
Retailer 14
-
£713 GBP
$956 USD
View
B
Retailer 15
-
£746 GBP
$1,000 USD
View
B
Retailer 16
-
£785 GBP
$1,052 USD
View
B
Retailer 17
-
£936 GBP
View
Most Expensive
B
Reve Diamonds
11AB9F759 · Oct 30
£1,012 GBP
$1,356 USD
View
17 more retailers have this diamond
Prices start from £187 GBPSave up to £825 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
£187 GBP