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Heart|Lab Grown|IGI

1.03ct E FL Heart Lab Grown Diamond

ID • E/FL • IGI LG818671749

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG818671749

Diamond specifications and retailer prices

From £248 GBP
$330 USD
As of October 30, 2026
Save £878 GBP (78%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: £1,149 GBP at NZ Jewellers · As of September 30, 2026
View at NZ Jewellers

About this 1.03ct lab-grown heart diamond

This 1.03ct 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 LG818671749 or 818671749. Listed at 18 retailers as of October 30, 2026, with a 354% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.03
Carat
E
Colour
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.3°
Pavilion angle39.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG818671749
Dimensions6.42 × 6.95 × 4.05 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
6.42 mm6.95 mm1.03 ctE / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG818671749
Side View
Table 58.0%Crown 36.3°Girdle: MED-STKPavilion 39.8°Culet: NoneDepth 58.3%

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 30
Current: £488 GBP|Low: £229 GBP|High: £1,413 GBP|Avg: £738 GBP|-22.5%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
October 30, 2026
Retailer 2£248 GBP
Retailer 7£389 GBP
Retailer 5£453 GBP
Retailer 11£461 GBP
Retailer 8£473 GBP
Retailer 10£484 GBP
Retailer 1£488 GBP
Retailer 12£617 GBP
Retailer 3£921 GBP
Retailer 4£1,002 GBP
Retailer 6£1,109 GBP
Retailer 9£1,126 GBP

36 data points across 12 retailers

18 retailers£248 GBP to £1,126 GBP

A
Cheapest Retailer
-
£248 GBP
$330 USD
Final sale: no returns
Retailer 2
-
£288 GBP
$384 USD
View
Price last confirmed 21 days ago
Retailer 3
-
£323 GBP
$430 USD
View
Price last confirmed 31 days ago
Retailer 4
-
£353 GBP
$470 USD
View
Price last confirmed 35 days ago
Retailer 5
-
£357 GBP
$476 USD
View
Price last confirmed 27 days ago
Retailer 6
-
£357 GBP
$476 USD
View
Price last confirmed 17 days ago
A
Retailer 7
-
£389 GBP
$518 USD
View
B+
Retailer 8
-
£453 GBP
€574 EUR
View
B+
Retailer 9
-
£461 GBP
$614 USD
View
B+
Retailer 10
-
£473 GBP
ZAR 10,180 ZAR
View
B+
Retailer 11
-
£484 GBP
$645 USD
View
B+
Retailer 12
-
£488 GBP
View
B+
Retailer 13
-
£617 GBP
$821 USD
View
B
Retailer 14
-
£921 GBP
$1,227 USD
View
B
Retailer 15
-
£1,002 GBP
$1,335 USD
View
B
Retailer 16
-
£1,109 GBP
View
B
Retailer 17
-
£1,126 GBP
$1,499 USD
View
Most Expensive
NZ Jewellers
ca505065-b642-429d-9b7e-5c9be786a09c · Sep 30
£1,149 GBP
$1,530 USD
View
Price last confirmed 29 days ago
17 more retailers have this diamond
Prices start from £248 GBPSave up to £878 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
1.03ct Heart
£248 GBP