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Heart|Lab Grown|IGI

1.09ct D FL Heart Lab Grown Diamond

ID • D/FL • IGI LG846663964

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG846663964

Diamond specifications and retailer prices

From £229 GBP
$307 USD
As of October 30, 2026
Save £1,055 GBP (82%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: £1,284 GBP at Brilliant Earth · As of October 30, 2026
View at Brilliant Earth

About this 1.09ct lab-grown heart diamond

This 1.09ct lab-grown heart sits in the classic one-carat band, graded D colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG846663964 or 846663964. Listed at 12 retailers as of October 30, 2026, with prices from £229 to £1,284, a £1,055 spread on the same certified stone. Brilliant Earth lists it at £1,284. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.09
Carat
D
Colour
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.5°
Pavilion angle40.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG846663964
Dimensions6.36 × 6.95 × 4.20 mm
L/W Ratio1.09
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 mm6.95 mm1.09 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG846663964
Side View
Table 58.0%Crown 34.5°Girdle: MED-STKPavilion 40.3°Culet: NoneDepth 60.4%

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: £1,284 GBP|Low: £229 GBP|High: £2,135 GBP|Avg: £630 GBP|-39.9%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
October 31, 2026
Retailer 8£229 GBP
Retailer 9£239 GBP
Retailer 7£349 GBP
Retailer 10£351 GBP
Retailer 4£426 GBP
Retailer 5£462 GBP
Retailer 3£498 GBP
Retailer 2£711 GBP
Retailer 12£744 GBP
Retailer 11£933 GBP
Retailer 6£1,134 GBP
Brilliant Earth£1,284 GBP

4 data points across 12 retailers

12 retailers£229 GBP to £1,284 GBP

A
Cheapest Retailer
-
£229 GBP
$307 USD
A
Retailer 2
-
£239 GBP
View
A
Retailer 3
-
£349 GBP
$467 USD
View
A
Retailer 4
-
£351 GBP
$470 USD
View
A
Retailer 5
-
£426 GBP
€543 EUR
View
B+
Retailer 6
-
£462 GBP
$619 USD
View
B+
Retailer 7
-
£498 GBP
$667 USD
View
B+
Retailer 8
-
£711 GBP
$953 USD
View
B+
Retailer 9
-
£744 GBP
$997 USD
View
B
Retailer 10
-
£933 GBP
View
B
Retailer 11
-
£1,134 GBP
$1,520 USD
View
Most Expensive
B
Brilliant Earth
22319521A · Oct 30
£1,284 GBP
$1,720 USD
View
11 more retailers have this diamond
Prices start from £229 GBPSave up to £1,055 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
£229 GBP