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Radiant|Lab Grown|IGI

1.72ct E SI1 Radiant Lab Grown Diamond

ID • E/SI1 • IGI LG594321721

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

Certificate IGI LG594321721

Diamond specifications and retailer prices

From $585 AUD
$411 USD
As of October 28, 2026
Save $1,507 AUD (72%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $2,092 AUD at Brilliant Earth · As of October 28, 2026
View at Brilliant Earth

About this 1.72ct lab-grown radiant diamond

This 1.72ct lab-grown radiant sits in the one-and-a-half to two carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG594321721 or 594321721. Listed at 10 retailers as of October 28, 2026, with prices from $585 to $2,092, a $1,507 spread on the same certified stone. Brilliant Earth lists it at $2,092. 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

1.72
Carat
E
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle44.5°
Pavilion angle34.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG594321721
Dimensions8.56 × 5.85 × 4.00 mm
L/W Ratio1.46
Culet sizePointed
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
8.56 mm5.85 mm1.72 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG594321721
Side View
Table 65.0%Crown 44.5°Girdle: MediumPavilion 34.9°Culet: NoneDepth 68.4%

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 28
Current: $2,092 AUD|Low: $218 AUD|High: $2,206 AUD|Avg: $978 AUD|-5.2%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
October 29, 2026
Retailer 8$302 AUD
Retailer 6$585 AUD
Retailer 2$605 AUD
Retailer 3$626 AUD
Retailer 9$799 AUD
Retailer 7$820 AUD
Retailer 4$1,078 AUD
Retailer 10$1,501 AUD
Retailer 5$1,569 AUD
Brilliant Earth$2,092 AUD

36 data points across 10 retailers

10 retailers$585 AUD to $2,092 AUD

A
Retailer 1
-
$313 AUD
$220 USD
Price last confirmed 31 days ago
A
Retailer 2
-
$330 AUD
$232 USD
View
Price last confirmed 32 days ago
B+
Retailer 3
-
$585 AUD
$411 USD
View
A
Retailer 4
-
$605 AUD
£335 GBP
View
A
Retailer 5
-
$626 AUD
€419 EUR
View
B+
Retailer 6
-
$799 AUD
$561 USD
View
B+
Retailer 7
-
$820 AUD
$576 USD
View
B+
Retailer 8
-
$1,078 AUD
$757 USD
View
B
Retailer 9
-
$1,569 AUD
£868 GBP
View
Most Expensive
B
Brilliant Earth
8073062A · Oct 28
$2,092 AUD
$1,470 USD
View
9 more retailers have this diamond
Prices start from $585 AUDSave up to $1,507 AUD

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
1.72ct Radiant
$585 AUD