Heart|Lab Grown|IGI

1.23ct E VVS1 Heart Lab Grown Diamond

ID • E/VVS1 • IGI LG840634566

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG840634566

Diamond specifications and retailer prices

From £157 GBP
$210 USD
As of October 30, 2026
Save £642 GBP (80%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: £799 GBP at Brilliant Earth · As of October 30, 2026
View at Brilliant Earth

About this 1.23ct lab-grown heart diamond

This 1.23ct lab-grown heart 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 LG840634566 or 840634566. Listed at 19 retailers as of October 30, 2026, with prices from £157 to £799, a £642 spread on the same certified stone. Brilliant Earth lists it at £799. 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 angle38.2°
Pavilion angle38.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG840634566
Dimensions6.73 × 7.32 × 4.20 mm
L/W Ratio1.09
Girdle conditionFaceted
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
6.73 mm7.32 mm1.23 ctE / VVS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG840634566
Side View
Table 61.0%Crown 38.2°Girdle: STK-THKPavilion 38.6°Culet: NoneDepth 57.4%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Oct 30
Current: £799 GBP|Low: £157 GBP|High: £806 GBP|Avg: £441 GBP
Brilliant Earth
Retailer 2
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Retailer 7
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Retailer 11
Retailer 12
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Retailer 19
October 31, 2026
Retailer 11£157 GBP
Retailer 5£176 GBP
Retailer 4£182 GBP
Retailer 9£195 GBP
Retailer 18£195 GBP
Retailer 12£239 GBP
Retailer 14£329 GBP
Retailer 16£335 GBP
Retailer 13£360 GBP
Retailer 19£377 GBP
Retailer 3£428 GBP
Retailer 17£476 GBP
Retailer 2£502 GBP
Retailer 8£626 GBP
Retailer 7£633 GBP
Retailer 10£664 GBP
Retailer 6£666 GBP
Retailer 15£785 GBP
Brilliant Earth£799 GBP

16 data points across 19 retailers

19 retailers£157 GBP to £799 GBP

A
Cheapest Retailer
-
£157 GBP
$210 USD
A
Retailer 2
-
£176 GBP
$236 USD
View
Final sale: no returns
A
Retailer 3
-
£182 GBP
$244 USD
View
A
Retailer 4
-
£195 GBP
$261 USD
View
A
Retailer 5
-
£195 GBP
$261 USD
View
A
Retailer 6
-
£239 GBP
View
A
Retailer 7
-
£329 GBP
€420 EUR
View
A
Retailer 8
-
£335 GBP
ZAR 7,243 ZAR
View
A
Retailer 9
-
£360 GBP
View
B+
Retailer 10
-
£377 GBP
$505 USD
View
B+
Retailer 11
-
£428 GBP
$574 USD
View
B+
Retailer 12
-
£476 GBP
A$981 AUD
View
B+
Retailer 13
-
£502 GBP
$673 USD
View
B
Retailer 14
-
£626 GBP
$839 USD
View
B
Retailer 15
-
£633 GBP
SGD 1,147 SGD
View
B
Retailer 16
-
£664 GBP
$890 USD
View
B
Retailer 17
-
£666 GBP
$892 USD
View
B
Retailer 18
-
£785 GBP
View
Most Expensive
B
Brilliant Earth
22143047A · Oct 30
£799 GBP
$1,070 USD
View
18 more retailers have this diamond
Prices start from £157 GBPSave up to £642 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 Heart
£157 GBP