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Radiant|Lab Grown|IGI

1.23ct E VVS1 Radiant Lab Grown Diamond

ID • E/VVS1 • IGI LG622490937

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

Certificate IGI LG622490937

Diamond specifications and retailer prices

From £146 GBP
$195 USD
As of October 27, 2026
Save £762 GBP (84%) vs most expensive(unlock to see where)
22 retailers carry this diamond
Most expensive: £909 GBP at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

About this 1.23ct lab-grown radiant diamond

This 1.23ct lab-grown radiant sits in the classic one-carat band, graded E colour (colourless) and VVS1 clarity (very-very-slightly-included), with a top-tier cut grade and certified by IGI LG622490937 or 622490937. Listed at 22 retailers as of October 27, 2026, with prices from £146 to £909, a £762 spread on the same certified stone. Brilliant Earth lists it at £909. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.23
Carat
E
Colour
VVS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle47.4°
Pavilion angle35.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG622490937
Dimensions7.44 × 5.45 × 3.48 mm
L/W Ratio1.37
Culet sizePointed
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
7.44 mm5.45 mm1.23 ctE / VVS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG622490937
Side View
Table 62.0%Crown 47.4°Girdle: STK-THKPavilion 35.6°Culet: NoneDepth 63.9%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Oct 27
Current: £909 GBP|Low: £140 GBP|High: £909 GBP|Avg: £439 GBP
Brilliant Earth
Retailer 2
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Retailer 4
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Retailer 20
October 29, 2026
Retailer 20£146 GBP
Retailer 11£164 GBP
Retailer 3£182 GBP
Retailer 8£182 GBP
Retailer 14£224 GBP
Retailer 6£246 GBP
Retailer 18£297 GBP
Retailer 16£312 GBP
Retailer 2£331 GBP
Retailer 9£366 GBP
Retailer 5£427 GBP
Retailer 17£443 GBP
Retailer 19£466 GBP
Retailer 4£584 GBP
Retailer 7£601 GBP
Retailer 12£624 GBP
Retailer 15£639 GBP
Retailer 13£854 GBP
Retailer 10£885 GBP
Brilliant Earth£909 GBP

39 data points across 20 retailers

22 retailers£146 GBP to £909 GBP

A
Cheapest Retailer
-
£146 GBP
$195 USD
A
Retailer 2
-
£164 GBP
$218 USD
View
Final sale: no returns
A
Retailer 3
-
£170 GBP
$226 USD
View
A
Retailer 4
-
£182 GBP
$242 USD
View
A
Retailer 5
-
£182 GBP
$242 USD
View
A
Retailer 6
-
£224 GBP
View
B+
Retailer 7
-
£246 GBP
$328 USD
View
A
Retailer 8
-
£297 GBP
€377 EUR
View
A
Retailer 9
-
£312 GBP
ZAR 6,713 ZAR
View
A
Retailer 10
-
£331 GBP
View
A
Retailer 11
-
£366 GBP
$488 USD
View
A
Retailer 12
-
£396 GBP
$527 USD
View
Price last confirmed 30 days ago
B+
Retailer 13
-
£427 GBP
$569 USD
View
A
Retailer 14
-
£443 GBP
A$908 AUD
View
B+
Retailer 15
-
£466 GBP
$621 USD
View
B+
Retailer 16
-
£584 GBP
$778 USD
View
B+
Retailer 17
-
£614 GBP
$817 USD
View
B+
Retailer 18
-
£624 GBP
$832 USD
View
B+
Retailer 19
-
£639 GBP
A$1,309 AUD
View
B
Retailer 20
-
£854 GBP
View
B
Retailer 21
-
£885 GBP
$1,178 USD
View
Most Expensive
B
Brilliant Earth
9399427A · Oct 29
£909 GBP
$1,210 USD
View
21 more retailers have this diamond
Prices start from £146 GBPSave up to £762 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
1.23ct Radiant
£146 GBP