Radiant|Lab Grown|IGI

1.28ct E VS1 Radiant Lab Grown Diamond

EX • E/VS1 • IGI LG844646123

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

Certificate IGI LG844646123

Diamond specifications and retailer prices

From £148 GBP
$198 USD
As of October 31, 2026
Save £740 GBP (83%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £888 GBP at Brilliant Earth · As of October 30, 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 LG844646123 or 844646123. Listed at 13 retailers as of October 30, 2026, with prices from £148 to £888, a £740 spread on the same certified stone. Brilliant Earth lists it at £888. 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 angle26.7°
Pavilion angle35.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG844646123
Dimensions7.56 × 5.29 × 3.59 mm
L/W Ratio1.43
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.56 mm5.29 mm1.28 ctE / VS1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG844646123
Side View
Table 66.0%Crown 26.7°Girdle: Slightly ThickPavilion 35.8°Culet: NoneDepth 67.9%

Caratlytics Score

How it works →
A
Excellent
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 31
Current: £888 GBP|Low: £148 GBP|High: £888 GBP|Avg: £420 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
October 31, 2026
Retailer 6£148 GBP
Retailer 10£160 GBP
Retailer 13£198 GBP
Retailer 2£266 GBP
Retailer 7£279 GBP
Retailer 11£281 GBP
Retailer 9£351 GBP
Retailer 5£392 GBP
Retailer 3£512 GBP
Retailer 8£535 GBP
Retailer 4£751 GBP
Retailer 12£820 GBP
Brilliant Earth£888 GBP

22 data points across 13 retailers

13 retailers£148 GBP to £888 GBP

A
Cheapest Retailer
-
£148 GBP
$198 USD
A
Retailer 2
-
£160 GBP
$215 USD
View
Final sale: no returns
A
Retailer 3
-
£198 GBP
View
A
Retailer 4
-
£266 GBP
€340 EUR
View
A
Retailer 5
-
£279 GBP
View
B+
Retailer 6
-
£281 GBP
$377 USD
View
A
Retailer 7
-
£351 GBP
$470 USD
View
Retailer 8
-
£392 GBP
A$808 AUD
View
Price last confirmed 8 days ago
B
Retailer 9
-
£512 GBP
A$1,056 AUD
View
B+
Retailer 10
-
£535 GBP
$717 USD
View
B
Retailer 11
-
£751 GBP
View
B
Retailer 12
-
£820 GBP
$1,099 USD
View
Most Expensive
B
Brilliant Earth
22340780A · Oct 30
£888 GBP
$1,190 USD
View
12 more retailers have this diamond
Prices start from £148 GBPSave up to £740 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
£148 GBP