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Heart|Lab Grown|IGI

1.23ct E IF Heart Lab Grown Diamond

VG • E/IF • IGI LG836696222

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG836696222

Diamond specifications and retailer prices

From £307 GBP
As of October 30, 2026
Save £961 GBP (76%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £1,269 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 IF clarity (flawless or internally-flawless), with a very-good cut grade and certified by IGI LG836696222 or 836696222. Listed at 14 retailers as of October 30, 2026, with prices from £307 to £1,269, a £961 spread on the same certified stone. Brilliant Earth lists it at £1,269. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.23
Carat
E
Colour
IF
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.4°
Pavilion angle37.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG836696222
Dimensions6.36 × 7.44 × 4.39 mm
L/W Ratio1.17
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
6.36 mm7.44 mm1.23 ctE / IF
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG836696222
Side View
Table 57.0%Crown 36.4°Girdle: MED-STKPavilion 37.5°Culet: NoneDepth 59.0%

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: £1,269 GBP|Low: £297 GBP|High: £1,769 GBP|Avg: £752 GBP|-28.3%
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
October 30, 2026
Retailer 10£307 GBP
Retailer 7£321 GBP
Retailer 4£399 GBP
Retailer 2£472 GBP
Retailer 3£483 GBP
Retailer 11£516 GBP
Retailer 6£618 GBP
Retailer 14£686 GBP
Retailer 5£864 GBP
Retailer 8£934 GBP
Retailer 12£966 GBP
Retailer 13£1,133 GBP
Retailer 9£1,160 GBP
Brilliant Earth£1,269 GBP

25 data points across 14 retailers

14 retailers£307 GBP to £1,269 GBP

A
Cheapest Retailer
-
£307 GBP
A
Retailer 2
-
£321 GBP
$430 USD
View
Final sale: no returns
A
Retailer 3
-
£399 GBP
$535 USD
View
B+
Retailer 4
-
£472 GBP
$633 USD
View
B+
Retailer 5
-
£483 GBP
ZAR 10,459 ZAR
View
B+
Retailer 6
-
£516 GBP
View
B+
Retailer 7
-
£618 GBP
$828 USD
View
B+
Retailer 8
-
£686 GBP
A$1,414 AUD
View
B
Retailer 9
-
£864 GBP
$1,158 USD
View
B
Retailer 10
-
£934 GBP
A$1,925 AUD
View
B
Retailer 11
-
£966 GBP
$1,294 USD
View
B
Retailer 12
-
£1,133 GBP
View
B
Retailer 13
-
£1,160 GBP
$1,555 USD
View
Most Expensive
B
Brilliant Earth
21696594A · Oct 30
£1,269 GBP
$1,700 USD
View
13 more retailers have this diamond
Prices start from £307 GBPSave up to £961 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
£307 GBP