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Heart|Lab Grown|IGI

3.73ct D FL Heart Lab Grown Diamond

ID • D/FL • IGI LG846663743

Certificate IGI LG846663743

Diamond specifications and retailer prices

From £3,355 GBP
$4,495 USD
As of October 29, 2026
Save £11,117 GBP (77%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: £14,471 GBP at With Clarity · As of October 30, 2026
View at With Clarity

About this 3.73ct lab-grown heart diamond

This 3.73ct lab-grown heart sits in the three to five carat band, graded D colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG846663743 or 846663743. Listed at 8 retailers as of October 29, 2026, with prices from £3,355 to £14,471, a £11,117 spread on the same certified stone. With Clarity lists it at £14,471. Lab-grown prices in the 2ct and up range have fallen 40 to 60% over the last 18 months. Use the cross-retailer spread above to find the lowest current listing.

The 4Cs

3.73
Carat
D
Colour
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginLab Grown
Grading LabIGI
CertificateIGI LG846663743
Dimensions9.97 × 10.35 × 6.34 mm
L/W Ratio1.04
Top View
9.97 mm10.35 mm3.73 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG846663743
Side View
Table 56.0%CrownGirdle: MED-STKPavilionCulet: NoneDepth 61.3%

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 29
Current: £3,867 GBP|Low: £3,355 GBP|High: £14,471 GBP|Avg: £7,253 GBP|-0.3%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
With Clarity
October 30, 2026
Retailer 2£3,355 GBP
Retailer 5£3,846 GBP
Retailer 1£3,867 GBP
Retailer 4£4,049 GBP
Retailer 6£6,244 GBP
Retailer 3£6,817 GBP
With Clarity£14,471 GBP

5 data points across 7 retailers

8 retailers£3,355 GBP to £14,471 GBP

A
Cheapest Retailer
-
£3,355 GBP
$4,495 USD
B+
Retailer 2
-
£3,846 GBP
$5,153 USD
View
B+
Retailer 3
-
£3,867 GBP
View
B+
Retailer 4
-
£4,049 GBP
$5,425 USD
View
B+
Retailer 5
-
£6,244 GBP
€7,968 EUR
View
B+
Retailer 6
-
£6,817 GBP
$9,134 USD
View
B
Retailer 7
-
£13,344 GBP
$17,880 USD
View
Most Expensive
B
With Clarity
846663743 · Oct 30
£14,471 GBP
$19,390 USD
View
7 more retailers have this diamond
Prices start from £3,355 GBPSave up to £11,117 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
3.73ct Heart
£3,355 GBP