Heart|Lab Grown|IGI

1.23ct E VVS1 Heart Lab Grown Diamond

ID • E/VVS1 • IGI LG830620399

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG830620399

Diamond specifications and retailer prices

From £176 GBP
$236 USD
As of October 30, 2026
Save £622 GBP (78%) vs most expensive(unlock to see where)
14 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 LG830620399 or 830620399. Listed at 14 retailers as of October 30, 2026, with prices from £176 to £799, a £622 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 angle38.3°
Pavilion angle38.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG830620399
Dimensions6.79 × 7.35 × 4.19 mm
L/W Ratio1.08
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
6.79 mm7.35 mm1.23 ctE / VVS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG830620399
Side View
Table 62.0%Crown 38.3°Girdle: MED-THKPavilion 38.2°Culet: NoneDepth 57.0%

Caratlytics Score

How it works →
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: £357 GBP|Low: £176 GBP|High: £785 GBP|Avg: £455 GBP|-0.2%
Retailer 1
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 2£176 GBP
Retailer 7£239 GBP
Retailer 8£329 GBP
Retailer 10£334 GBP
Retailer 11£335 GBP
Retailer 1£357 GBP
Retailer 12£428 GBP
Retailer 13£476 GBP
Retailer 6£628 GBP
Retailer 3£633 GBP
Retailer 4£664 GBP
Retailer 5£666 GBP
Retailer 9£785 GBP

6 data points across 13 retailers

14 retailers£176 GBP to £799 GBP

A
Cheapest Retailer
-
£176 GBP
$236 USD
Final sale: no returns
A
Retailer 2
-
£239 GBP
View
A
Retailer 3
-
£329 GBP
€420 EUR
View
A
Retailer 4
-
£334 GBP
$448 USD
View
A
Retailer 5
-
£335 GBP
ZAR 7,243 ZAR
View
A
Retailer 6
-
£357 GBP
View
B+
Retailer 7
-
£428 GBP
$574 USD
View
B+
Retailer 8
-
£476 GBP
A$981 AUD
View
B
Retailer 9
-
£628 GBP
$842 USD
View
B
Retailer 10
-
£633 GBP
SGD 1,147 SGD
View
B
Retailer 11
-
£664 GBP
$890 USD
View
B
Retailer 12
-
£666 GBP
$892 USD
View
B
Retailer 13
-
£785 GBP
View
Most Expensive
B
Brilliant Earth
22311013A · Oct 30
£799 GBP
$1,070 USD
View
13 more retailers have this diamond
Prices start from £176 GBPSave up to £622 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
£176 GBP