Radiant|Lab Grown|IGI

1.28ct E VS1 Radiant Lab Grown Diamond

EX • E/VS1 • IGI LG836665002

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

Certificate IGI LG836665002

Diamond specifications and retailer prices

From £146 GBP
$195 USD
As of October 30, 2026
Save £765 GBP (84%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: £911 GBP at Brilliant Earth · As of October 26, 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 VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG836665002 or 836665002. Listed at 20 retailers as of October 26, 2026, with prices from £146 to £911, a £765 spread on the same certified stone. Brilliant Earth lists it at £911. 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
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle45.1°
Pavilion angle35.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG836665002
Dimensions7.81 × 5.26 × 3.62 mm
L/W Ratio1.48
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.81 mm5.26 mm1.28 ctE / VS1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG836665002
Side View
Table 65.0%Crown 45.1°Girdle: MediumPavilion 35.3°Culet: NoneDepth 68.8%

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 30
Current: £911 GBP|Low: £146 GBP|High: £911 GBP|Avg: £422 GBP
Brilliant Earth
Retailer 2
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October 31, 2026
Retailer 4£146 GBP
Retailer 5£162 GBP
Retailer 20£169 GBP
Retailer 18£181 GBP
Retailer 19£181 GBP
Retailer 13£226 GBP
Retailer 16£310 GBP
Retailer 6£315 GBP
Retailer 2£321 GBP
Retailer 14£329 GBP
Retailer 9£357 GBP
Retailer 3£422 GBP
Retailer 17£440 GBP
Retailer 12£481 GBP
Retailer 11£580 GBP
Retailer 8£581 GBP
Retailer 10£620 GBP
Retailer 15£847 GBP
Retailer 7£879 GBP
Brilliant Earth£911 GBP

11 data points across 20 retailers

20 retailers£146 GBP to £911 GBP

A
Cheapest Retailer
-
£146 GBP
$195 USD
A
Retailer 2
-
£162 GBP
$217 USD
View
Final sale: no returns
A
Retailer 3
-
£169 GBP
$226 USD
View
A
Retailer 4
-
£181 GBP
$242 USD
View
A
Retailer 5
-
£181 GBP
$242 USD
View
A
Retailer 6
-
£226 GBP
View
A
Retailer 7
-
£310 GBP
ZAR 6,703 ZAR
View
A
Retailer 8
-
£315 GBP
$422 USD
View
A
Retailer 9
-
£321 GBP
€409 EUR
View
A
Retailer 10
-
£329 GBP
View
A
Retailer 11
-
£357 GBP
$478 USD
View
B+
Retailer 12
-
£422 GBP
$565 USD
View
B+
Retailer 13
-
£440 GBP
A$907 AUD
View
Retailer 14
-
£481 GBP
$645 USD
View
Price last confirmed 10 days ago
B
Retailer 15
-
£580 GBP
$777 USD
View
B
Retailer 16
-
£581 GBP
$779 USD
View
B
Retailer 17
-
£620 GBP
$830 USD
View
B
Retailer 18
-
£847 GBP
View
B
Retailer 19
-
£879 GBP
$1,177 USD
View
Most Expensive
B
Brilliant Earth
22221917A · Oct 26
£911 GBP
$1,220 USD
View
19 more retailers have this diamond
Prices start from £146 GBPSave up to £765 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
£146 GBP