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Heart|Lab Grown|IGI

1.54ct D FL Heart Lab Grown Diamond

ID • D/FL • IGI LG846663393

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG846663393

Diamond specifications and retailer prices

From £470 GBP
As of November 4, 2026
Save £2,742 GBP (85%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £3,212 GBP at With Clarity · As of November 5, 2026
View at With Clarity

About this 1.54ct lab-grown heart diamond

This 1.54ct lab-grown heart sits in the one-and-a-half to two carat band, graded D colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG846663393 or 846663393. Listed at 13 retailers as of November 4, 2026, with prices from £470 to £3,212, a £2,742 spread on the same certified stone. With Clarity lists it at £3,212. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.54
Carat
D
Colour
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.6°
Pavilion angle41°
OriginLab Grown
Grading LabIGI
CertificateIGI LG846663393
Dimensions7.20 × 7.44 × 4.78 mm
L/W Ratio1.03
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
7.20 mm7.44 mm1.54 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG846663393
Side View
Table 57.0%Crown 35.6°Girdle: STK-THKPavilion 41°Culet: NoneDepth 64.2%

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: Nov 4
Current: £615 GBP|Low: £470 GBP|High: £3,652 GBP|Avg: £1,415 GBP|-0.5%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
With Clarity
November 4, 2026
Retailer 10£470 GBP
Retailer 4£512 GBP
Retailer 1£615 GBP
Retailer 6£626 GBP
Retailer 11£661 GBP
Retailer 3£892 GBP
Retailer 2£896 GBP
Retailer 5£1,067 GBP
Retailer 9£1,393 GBP
Retailer 13£1,533 GBP
Retailer 12£2,147 GBP
Retailer 7£2,297 GBP
Retailer 8£2,874 GBP
With Clarity£3,212 GBP

9 data points across 14 retailers

13 retailers£470 GBP to £3,212 GBP

A
Cheapest Retailer
-
£470 GBP
A
Retailer 2
-
£512 GBP
View
A
Retailer 3
-
£615 GBP
View
A
Retailer 4
-
£626 GBP
View
A
Retailer 5
-
£661 GBP
View
B+
Retailer 6
-
£892 GBP
View
B+
Retailer 7
-
£896 GBP
View
B+
Retailer 8
-
£1,393 GBP
View
B
Retailer 9
-
£1,533 GBP
View
B
Retailer 10
-
£2,147 GBP
View
B
Retailer 11
-
£2,297 GBP
View
B
Retailer 12
-
£2,874 GBP
View
Most Expensive
B
With Clarity
846663393 · Nov 5
£3,212 GBP
$4,336 USD
View
12 more retailers have this diamond
Prices start from £470 GBPSave up to £2,742 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
1.54ct Heart
£470 GBP