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Radiant|Lab Grown|IGI

1.28ct E VVS1 Radiant Lab Grown Diamond

ID • E/VVS1 • IGI LG831645783

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

Certificate IGI LG831645783

Diamond specifications and retailer prices

From £166 GBP
$221 USD
As of October 27, 2026
Save £855 GBP (84%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: £1,021 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 LG831645783 or 831645783. Listed at 20 retailers as of October 27, 2026, with prices from £166 to £1,021, a £855 spread on the same certified stone. Brilliant Earth lists it at £1,021. 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 angle40.5°
Pavilion angle35.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG831645783
Dimensions7.80 × 5.38 × 3.62 mm
L/W Ratio1.45
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.80 mm5.38 mm1.28 ctE / VVS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG831645783
Side View
Table 63.0%Crown 40.5°Girdle: MediumPavilion 35.4°Culet: NoneDepth 67.3%

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 27
Current: £1,021 GBP|Low: £164 GBP|High: £1,066 GBP|Avg: £520 GBP|-4.2%
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
Retailer 20
October 29, 2026
Retailer 7£166 GBP
Retailer 11£186 GBP
Retailer 16£193 GBP
Retailer 4£206 GBP
Retailer 6£206 GBP
Retailer 3£278 GBP
Retailer 14£354 GBP
Retailer 19£357 GBP
Retailer 2£383 GBP
Retailer 20£465 GBP
Retailer 15£504 GBP
Retailer 9£662 GBP
Retailer 17£665 GBP
Retailer 18£676 GBP
Retailer 12£682 GBP
Retailer 10£702 GBP
Retailer 8£710 GBP
Retailer 13£830 GBP
Retailer 5£947 GBP
Brilliant Earth£1,021 GBP

36 data points across 20 retailers

20 retailers£166 GBP to £1,021 GBP

A
Cheapest Retailer
-
£166 GBP
$221 USD
A
Retailer 2
-
£186 GBP
$248 USD
View
Final sale: no returns
A
Retailer 3
-
£193 GBP
$257 USD
View
A
Retailer 4
-
£206 GBP
$274 USD
View
A
Retailer 5
-
£206 GBP
$274 USD
View
B+
Retailer 6
-
£278 GBP
$370 USD
View
A
Retailer 7
-
£354 GBP
ZAR 7,614 ZAR
View
A
Retailer 8
-
£357 GBP
€453 EUR
View
A
Retailer 9
-
£383 GBP
View
B+
Retailer 10
-
£465 GBP
$619 USD
View
B+
Retailer 11
-
£504 GBP
A$1,032 AUD
View
B+
Retailer 12
-
£662 GBP
$882 USD
View
B+
Retailer 13
-
£665 GBP
$885 USD
View
Retailer 14
-
£676 GBP
$900 USD
View
Price last confirmed 8 days ago
Retailer 15
-
£682 GBP
A$1,397 AUD
View
Price last confirmed 24 days ago
B+
Retailer 16
-
£702 GBP
$935 USD
View
B+
Retailer 17
-
£710 GBP
$945 USD
View
B
Retailer 18
-
£830 GBP
View
B
Retailer 19
-
£947 GBP
$1,261 USD
View
Most Expensive
B
Brilliant Earth
21123272A · Oct 29
£1,021 GBP
$1,360 USD
View
19 more retailers have this diamond
Prices start from £166 GBPSave up to £855 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
£166 GBP