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Heart|Lab Grown|IGI

1.45ct D FL Heart Lab Grown Diamond

ID • D/FL • IGI LG831691891

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG831691891

Diamond specifications and retailer prices

From £297 GBP
As of November 4, 2026
Save £1,940 GBP (87%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: £2,237 GBP at Brilliant Earth · As of November 4, 2026
View at Brilliant Earth

About this 1.45ct lab-grown heart diamond

This 1.45ct lab-grown heart sits in the one-and-a-quarter to one-and-a-half carat band, graded D colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG831691891 or 831691891. Listed at 17 retailers as of November 4, 2026, with prices from £297 to £2,237, a £1,940 spread on the same certified stone. Brilliant Earth lists it at £2,237. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.45
Carat
D
Colour
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle39.1°
Pavilion angle37.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG831691891
Dimensions6.91 × 7.76 × 4.54 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
6.91 mm7.76 mm1.45 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG831691891
Side View
Table 59.0%Crown 39.1°Girdle: STK-THKPavilion 37.8°Culet: NoneDepth 58.5%

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: Nov 4
Current: £2,237 GBP|Low: £297 GBP|High: £2,237 GBP|Avg: £862 GBP
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
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Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
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Retailer 17
November 5, 2026
Retailer 13£297 GBP
Retailer 4£333 GBP
Retailer 15£356 GBP
Retailer 8£368 GBP
Retailer 12£378 GBP
Retailer 11£478 GBP
Retailer 5£578 GBP
Retailer 16£582 GBP
Retailer 2£598 GBP
Retailer 6£824 GBP
Retailer 17£1,032 GBP
Retailer 9£1,159 GBP
Retailer 14£1,183 GBP
Retailer 7£1,209 GBP
Retailer 3£1,326 GBP
Retailer 10£1,433 GBP
Brilliant Earth£2,237 GBP

3 data points across 17 retailers

17 retailers£297 GBP to £2,237 GBP

A
Cheapest Retailer
-
£297 GBP
A
Retailer 2
-
£333 GBP
View
A
Retailer 3
-
£356 GBP
View
Final sale: no returns
A
Retailer 4
-
£368 GBP
View
A
Retailer 5
-
£378 GBP
View
A
Retailer 6
-
£478 GBP
View
A
Retailer 7
-
£578 GBP
View
A
Retailer 8
-
£582 GBP
View
A
Retailer 9
-
£598 GBP
View
B+
Retailer 10
-
£824 GBP
View
B+
Retailer 11
-
£1,032 GBP
View
B+
Retailer 12
-
£1,159 GBP
View
B+
Retailer 13
-
£1,183 GBP
View
B
Retailer 14
-
£1,209 GBP
View
B
Retailer 15
-
£1,326 GBP
View
B
Retailer 16
-
£1,433 GBP
View
Most Expensive
B
Brilliant Earth
22480674A · Nov 4
£2,237 GBP
$3,020 USD
View
16 more retailers have this diamond
Prices start from £297 GBPSave up to £1,940 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
1.45ct Heart
£297 GBP