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Heart|Lab Grown|IGI

1.73ct D FL Heart Lab Grown Diamond

EX • D/FL • IGI LG801694239

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG801694239

Diamond specifications and retailer prices

From £1,285 GBP
A$2,648 AUD
As of October 31, 2026
2 retailers carry this diamond
Most expensive: £4,232 GBP at Brilliant Earth · As of September 23, 2026
View at Brilliant Earth

About this 1.73ct lab-grown heart diamond

This 1.73ct 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 LG801694239 or 801694239. Listed at 2 retailers as of October 31, 2026. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.73
Carat
D
Colour
FL
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.1°
Pavilion angle39.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG801694239
Dimensions7.80 × 8.22 × 4.80 mm
L/W Ratio1.05
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
7.80 mm8.22 mm1.73 ctD / FL
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG801694239
Side View
Table 57.0%Crown 33.1°Girdle: MED-STKPavilion 39.6°Culet: NoneDepth 58.4%

Caratlytics Score

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B+
Very Good
Strong quality and value balance
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Price History

Last verified: Oct 31
Current: £4,232 GBP|Low: £857 GBP|High: £6,135 GBP|Avg: £2,137 GBP
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
October 26, 2026
Retailer 6£872 GBP
Retailer 7£873 GBP
Retailer 5£898 GBP
Retailer 9£1,070 GBP
Retailer 2£1,285 GBP
Retailer 3£1,382 GBP
Retailer 8£1,728 GBP
Retailer 4£3,033 GBP
Brilliant Earth£4,232 GBP
Retailer 10£6,135 GBP

8 data points across 10 retailers

2 retailers

B+
Cheapest Retailer
-
£1,285 GBP
A$2,648 AUD
Most Expensive
Brilliant Earth
20785900Y · Sep 23
£4,232 GBP
$5,670 USD
View
Price last confirmed 37 days ago
1 more retailer has this diamond
Prices start from £1,285 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.

B+
1.73ct Heart
£1,285 GBP