Radiant|Lab Grown|IGI

1.28ct E IF Radiant Lab Grown Diamond

ID • E/IF • IGI LG732507011

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

Certificate IGI LG732507011

Diamond specifications and retailer prices

From £216 GBP
$289 USD
As of October 30, 2026
Save £1,307 GBP (86%) vs most expensive(unlock to see where)
24 retailers carry this diamond
Most expensive: £1,523 GBP at Brilliant Earth · As of October 31, 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 IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG732507011 or 732507011. Listed at 24 retailers as of October 30, 2026, with prices from £216 to £1,523, a £1,307 spread on the same certified stone. Brilliant Earth lists it at £1,523. 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
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle43.2°
Pavilion angle35.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG732507011
Dimensions7.79 × 5.28 × 3.59 mm
L/W Ratio1.48
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.79 mm5.28 mm1.28 ctE / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG732507011
Side View
Table 65.0%Crown 43.2°Girdle: MED-STKPavilion 35.4°Culet: NoneDepth 68.0%

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: £1,523 GBP|Low: £207 GBP|High: £1,523 GBP|Avg: £606 GBP
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
November 1, 2026
Retailer 4£216 GBP
Retailer 7£241 GBP
Retailer 5£267 GBP
Retailer 3£360 GBP
Retailer 13£384 GBP
Retailer 9£453 GBP
Retailer 6£455 GBP
Retailer 12£459 GBP
Retailer 8£473 GBP
Retailer 11£652 GBP
Retailer 15£821 GBP
Retailer 10£843 GBP
Retailer 2£1,071 GBP
Retailer 14£1,116 GBP
Brilliant Earth£1,523 GBP

43 data points across 15 retailers

24 retailers£216 GBP to £1,523 GBP

A
Cheapest Retailer
-
£216 GBP
$289 USD
A
Retailer 2
-
£241 GBP
$323 USD
View
Final sale: no returns
A
Retailer 3
-
£250 GBP
$335 USD
View
Retailer 4
-
£267 GBP
$358 USD
View
Price last confirmed 7 days ago
A
Retailer 5
-
£267 GBP
$358 USD
View
A
Retailer 6
-
£360 GBP
$482 USD
View
A
Retailer 7
-
£384 GBP
$515 USD
View
A
Retailer 8
-
£453 GBP
€578 EUR
View
A
Retailer 9
-
£455 GBP
$609 USD
View
A
Retailer 10
-
£459 GBP
ZAR 9,943 ZAR
View
A
Retailer 11
-
£473 GBP
View
B+
Retailer 12
-
£652 GBP
A$1,344 AUD
View
B+
Retailer 13
-
£658 GBP
$881 USD
View
B+
Retailer 14
-
£821 GBP
$1,100 USD
View
B+
Retailer 15
-
£843 GBP
A$1,738 AUD
View
B+
Retailer 16
-
£859 GBP
$1,151 USD
View
B+
Retailer 17
-
£896 GBP
$1,200 USD
View
B+
Retailer 18
-
£952 GBP
$1,275 USD
View
B
Retailer 19
-
£1,046 GBP
View
B+
Retailer 20
-
£1,071 GBP
View
B
Retailer 21
-
£1,102 GBP
$1,477 USD
View
Retailer 22
-
£1,116 GBP
$1,495 USD
View
Price last confirmed 10 days ago
Retailer 23
-
£1,377 GBP
$1,845 USD
View
Price last confirmed 11 days ago
Most Expensive
B
Brilliant Earth
15733199A · Oct 31
£1,523 GBP
$2,040 USD
View
23 more retailers have this diamond
Prices start from £216 GBPSave up to £1,307 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
£216 GBP