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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 $186 USD
As of October 27, 2026
Save $1,644 USD (90%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: $1,830 USD 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 $186 to $1,830, a $1,644 spread on the same certified stone. Brilliant Earth lists it at $1,830. 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
Color
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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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 27
Current: $1,830 USD|Low: $183 USD|High: $1,890 USD|Avg: $868 USD|-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$186 USD
Retailer 5$216 USD
Retailer 4$406 USD
Retailer 8$498 USD
Retailer 3$745 USD
Retailer 7$820 USD
Retailer 10$879 USD
Retailer 9$1,186 USD
Retailer 2$1,199 USD
Brilliant Earth$1,830 USD

16 data points across 10 retailers

7 retailers$186 USD to $1,830 USD

A
Cheapest Retailer
-
$186 USD
A
Retailer 2
-
$216 USD
View
B+
Retailer 3
-
$406 USD
View
B
Retailer 4
-
$745 USD
View
B+
Retailer 5
-
$820 USD
View
B
Retailer 6
-
$1,199 USD
£944 GBP
View
Most Expensive
B
Brilliant Earth
6521622Y · Oct 29
$1,830 USD
View
6 more retailers have this diamond
Prices start from $186 USDSave up to $1,644 USD

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
$186 USD