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Radiant|Lab Grown|IGI

1.73ct E SI2 Radiant Lab Grown Diamond

ID • E/SI2 • IGI LG557216924

Shape and cutting style on the report: Cut cornered rectangular modified brilliant

Certificate IGI LG557216924

Diamond specifications and retailer prices

From £140 GBP
$186 USD
As of October 27, 2026
Save £1,235 GBP (90%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: £1,374 GBP at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

About this 1.73ct lab-grown radiant diamond

This 1.73ct lab-grown radiant sits in the one-and-a-half to two carat band, graded E colour (colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG557216924 or 557216924. Listed at 7 retailers as of October 27, 2026, with prices from £140 to £1,374, a £1,235 spread on the same certified stone. Brilliant Earth lists it at £1,374. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.73
Carat
E
Colour
SI2
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle43.7°
Pavilion angle34.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG557216924
Dimensions8.45 × 5.96 × 4.01 mm
L/W Ratio1.42
Culet sizeNone
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
8.45 mm5.96 mm1.73 ctE / SI2
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG557216924
Side View
Table 63.5%Crown 43.7°Girdle: MediumPavilion 34.1°Culet: NoneDepth 67.3%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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Price History

Last verified: Oct 27
Current: £1,374 GBP|Low: £137 GBP|High: £1,419 GBP|Avg: £652 GBP|-3.2%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
October 29, 2026
Retailer 6£140 GBP
Retailer 5£162 GBP
Retailer 4£305 GBP
Retailer 8£374 GBP
Retailer 3£559 GBP
Retailer 7£616 GBP
Retailer 10£660 GBP
Retailer 9£891 GBP
Retailer 2£900 GBP
Brilliant Earth£1,374 GBP

16 data points across 10 retailers

7 retailers£140 GBP to £1,374 GBP

A
Cheapest Retailer
-
£140 GBP
$186 USD
A
Retailer 2
-
£162 GBP
$216 USD
View
B+
Retailer 3
-
£305 GBP
$406 USD
View
B
Retailer 4
-
£559 GBP
$745 USD
View
B+
Retailer 5
-
£616 GBP
$820 USD
View
B
Retailer 6
-
£900 GBP
View
Most Expensive
B
Brilliant Earth
6521622Y · Oct 29
£1,374 GBP
$1,830 USD
View
6 more retailers have this diamond
Prices start from £140 GBPSave up to £1,235 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 Radiant
£140 GBP