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Cushion|Lab Grown|IGI

1.73ct D FL Cushion Lab Grown Diamond

ID • D/FL • IGI LG804650021

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG804650021

Diamond specifications and retailer prices

From £1,146 GBP
$1,535 USD
As of October 31, 2026
Save £1,526 GBP (57%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: £2,672 GBP at Brilliant Earth · As of October 30, 2026
View at Brilliant Earth

About this 1.73ct lab-grown cushion diamond

This 1.73ct lab-grown cushion 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 LG804650021 or 804650021. Listed at 2 retailers as of October 30, 2026, with prices from £1,146 to £2,672, a £1,526 spread on the same certified stone. Brilliant Earth lists it at £2,672. 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
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32.9°
Pavilion angle32.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG804650021
Dimensions8.66 × 6.04 × 3.93 mm
L/W Ratio1.43
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
8.66 mm6.04 mm1.73 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG804650021
Side View
Table 58.0%Crown 32.9°Girdle: MED-STKPavilion 32.8°Culet: NoneDepth 65.1%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Oct 31
Current: £2,672 GBP|Low: £788 GBP|High: £4,301 GBP|Avg: £2,166 GBP|-30.9%
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 9£788 GBP
Retailer 5£842 GBP
Retailer 2£1,146 GBP
Retailer 8£1,254 GBP
Retailer 12£1,724 GBP
Retailer 7£1,914 GBP
Retailer 11£1,931 GBP
Retailer 6£2,204 GBP
Brilliant Earth£2,672 GBP
Retailer 3£2,957 GBP
Retailer 10£3,561 GBP
Retailer 4£4,301 GBP

11 data points across 12 retailers

2 retailers£1,146 GBP to £2,672 GBP

A
Cheapest Retailer
-
£1,146 GBP
$1,535 USD
Most Expensive
B
Brilliant Earth
21404720Y · Oct 30
£2,672 GBP
$3,580 USD
View
1 more retailer has this diamond
Prices start from £1,146 GBPSave up to £1,526 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
1.73ct Cushion
£1,146 GBP