CaratHunter
Plans
Heart|Lab Grown|IGI

1.23ct E FL Heart Lab Grown Diamond

ID • E/FL • IGI LG836617848

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG836617848

Diamond specifications and retailer prices

From £244 GBP
$325 USD
As of October 27, 2026
Save £1,701 GBP (87%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: £1,945 GBP at Brilliant Earth · As of October 28, 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 FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG836617848 or 836617848. Listed at 19 retailers as of October 27, 2026, with prices from £244 to £1,945, a £1,701 spread on the same certified stone. Brilliant Earth lists it at £1,945. 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
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32.1°
Pavilion angle37.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG836617848
Dimensions6.72 × 7.51 × 4.12 mm
L/W Ratio1.12
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
6.72 mm7.51 mm1.23 ctE / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG836617848
Side View
Table 60.0%Crown 32.1°Girdle: STK-THKPavilion 37.6°Culet: NoneDepth 54.9%

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 27
Current: £1,945 GBP|Low: £244 GBP|High: £1,945 GBP|Avg: £706 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
Retailer 14
Retailer 15
Retailer 16
Retailer 17
Retailer 18
Retailer 19
October 29, 2026
Retailer 10£244 GBP
Retailer 4£283 GBP
Retailer 8£298 GBP
Retailer 16£303 GBP
Retailer 19£303 GBP
Retailer 14£322 GBP
Retailer 3£417 GBP
Retailer 7£487 GBP
Retailer 9£490 GBP
Retailer 12£520 GBP
Retailer 2£541 GBP
Retailer 18£628 GBP
Retailer 17£888 GBP
Retailer 15£973 GBP
Retailer 5£1,007 GBP
Retailer 11£1,131 GBP
Retailer 13£1,215 GBP
Retailer 6£1,295 GBP
Brilliant Earth£1,945 GBP

17 data points across 19 retailers

19 retailers£244 GBP to £1,945 GBP

A
Cheapest Retailer
-
£244 GBP
$325 USD
A
Retailer 2
-
£283 GBP
$377 USD
View
A
Retailer 3
-
£298 GBP
$397 USD
View
Final sale: no returns
A
Retailer 4
-
£303 GBP
$403 USD
View
A
Retailer 5
-
£303 GBP
$403 USD
View
Retailer 6
-
£322 GBP
View
Price last confirmed 12 days ago
A
Retailer 7
-
£417 GBP
$555 USD
View
A
Retailer 8
-
£487 GBP
$649 USD
View
A
Retailer 9
-
£490 GBP
$653 USD
View
A
Retailer 10
-
£520 GBP
ZAR 11,191 ZAR
View
B+
Retailer 11
-
£541 GBP
View
B+
Retailer 12
-
£628 GBP
$836 USD
View
B
Retailer 13
-
£888 GBP
$1,182 USD
View
B
Retailer 14
-
£973 GBP
$1,296 USD
View
B
Retailer 15
-
£1,007 GBP
$1,341 USD
View
B
Retailer 16
-
£1,131 GBP
SGD 2,035 SGD
View
B+
Retailer 17
-
£1,215 GBP
View
B
Retailer 18
-
£1,295 GBP
$1,725 USD
View
Most Expensive
B
Brilliant Earth
21813717A · Oct 28
£1,945 GBP
$2,590 USD
View
18 more retailers have this diamond
Prices start from £244 GBPSave up to £1,701 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
£244 GBP