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Heart|Lab Grown|IGI

1.09ct E FL Heart Lab Grown Diamond

GD • E/FL • IGI LG818657606

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG818657606

Diamond specifications and retailer prices

From £260 GBP
$349 USD
As of October 30, 2026
Save £901 GBP (78%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: £1,203 GBP at NZ Jewellers · As of September 30, 2026
View at NZ Jewellers

About this 1.09ct lab-grown heart diamond

This 1.09ct lab-grown heart sits in the classic one-carat band, graded E colour (colourless) and FL clarity (flawless or internally-flawless), with a standard cut grade and certified by IGI LG818657606 or 818657606. Listed at 18 retailers as of October 29, 2026, with a 346% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

1.09
Carat
E
Colour
FL
Clarity
Good
Cut

Specifications

CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.9°
Pavilion angle38.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG818657606
Dimensions6.55 × 7.07 × 4.03 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
6.55 mm7.07 mm1.09 ctE / FL
OriginLab Grown
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG818657606
Side View
Table 59.0%Crown 36.9°Girdle: STK-THKPavilion 38.8°Culet: NoneDepth 57.0%

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: £512 GBP|Low: £240 GBP|High: £1,481 GBP|Avg: £751 GBP|-14.8%
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 30, 2026
Retailer 2£260 GBP
Retailer 5£374 GBP
Retailer 9£407 GBP
Retailer 6£471 GBP
Retailer 8£495 GBP
Retailer 12£507 GBP
Retailer 1£512 GBP
Retailer 11£526 GBP
Retailer 13£649 GBP
Retailer 3£961 GBP
Retailer 4£1,050 GBP
Retailer 10£1,156 GBP
Retailer 7£1,161 GBP

34 data points across 13 retailers

18 retailers£260 GBP to £1,161 GBP

A
Cheapest Retailer
-
£260 GBP
$349 USD
Final sale: no returns
Retailer 2
-
£302 GBP
$404 USD
View
Price last confirmed 22 days ago
Retailer 3
-
£338 GBP
$453 USD
View
Price last confirmed 31 days ago
Retailer 4
-
£369 GBP
$495 USD
View
Price last confirmed 35 days ago
Retailer 5
-
£374 GBP
$501 USD
View
Price last confirmed 27 days ago
Retailer 6
-
£374 GBP
$501 USD
View
Price last confirmed 18 days ago
B+
Retailer 7
-
£407 GBP
$545 USD
View
B+
Retailer 8
-
£471 GBP
€601 EUR
View
B+
Retailer 9
-
£495 GBP
ZAR 10,717 ZAR
View
B+
Retailer 10
-
£507 GBP
$679 USD
View
B+
Retailer 11
-
£512 GBP
View
B
Retailer 12
-
£526 GBP
$705 USD
View
B
Retailer 13
-
£649 GBP
$869 USD
View
B
Retailer 14
-
£961 GBP
$1,287 USD
View
B
Retailer 15
-
£1,050 GBP
$1,407 USD
View
B
Retailer 16
-
£1,156 GBP
$1,549 USD
View
B
Retailer 17
-
£1,161 GBP
View
Most Expensive
NZ Jewellers
9d2c8750-d434-4852-968d-0a9f35b2a6f9 · Sep 30
£1,203 GBP
$1,612 USD
View
Price last confirmed 30 days ago
17 more retailers have this diamond
Prices start from £260 GBPSave up to £901 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
1.09ct Heart
£260 GBP