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Radiant|Lab Grown|IGI

1.72ct D SI1 Radiant Lab Grown Diamond

ID • D/SI1 • IGI LG629439991

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

Certificate IGI LG629439991

Diamond specifications and retailer prices

From $348 CAD
$249 USD
As of October 30, 2026
Save $1,566 CAD (82%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $1,914 CAD at Brilliant Earth · As of October 30, 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 D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG629439991 or 629439991. Listed at 15 retailers as of October 30, 2026, with prices from $348 to $1,914, a $1,566 spread on the same certified stone. Brilliant Earth lists it at $1,914. 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
D
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle45.3°
Pavilion angle33.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG629439991
Dimensions8.76 × 5.89 × 3.93 mm
L/W Ratio1.49
Culet sizePointed
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
8.76 mm5.89 mm1.72 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG629439991
Side View
Table 62.0%Crown 45.3°Girdle: MED-STKPavilion 33.8°Culet: NoneDepth 66.7%

Caratlytics Score

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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 30
Current: $1,914 CAD|Low: $253 CAD|High: $3,394 CAD|Avg: $1,209 CAD|-43.6%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
October 30, 2026
Retailer 12$390 CAD
Retailer 5$447 CAD
Retailer 11$580 CAD
Retailer 8$772 CAD
Retailer 2$820 CAD
Retailer 4$873 CAD
Retailer 13$881 CAD
Retailer 10$1,057 CAD
Retailer 6$1,276 CAD
Retailer 14$1,458 CAD
Retailer 7$1,730 CAD
Retailer 3$1,791 CAD
Retailer 9$1,907 CAD
Brilliant Earth$1,914 CAD

40 data points across 14 retailers

15 retailers$348 CAD to $1,914 CAD

A
Cheapest Retailer
-
$348 CAD
$249 USD
A
Retailer 2
-
$390 CAD
$279 USD
View
Final sale: no returns
A
Retailer 3
-
$404 CAD
$289 USD
View
A
Retailer 4
-
$432 CAD
$309 USD
View
A
Retailer 5
-
$432 CAD
$309 USD
View
B+
Retailer 6
-
$580 CAD
$415 USD
View
Retailer 7
-
$772 CAD
€526 EUR
View
Price last confirmed 7 days ago
B+
Retailer 8
-
$820 CAD
£462 GBP
View
B+
Retailer 9
-
$881 CAD
$631 USD
View
B+
Retailer 10
-
$1,057 CAD
$757 USD
View
B
Retailer 11
-
$1,386 CAD
$992 USD
View
B
Retailer 12
-
$1,458 CAD
$1,044 USD
View
B
Retailer 13
-
$1,730 CAD
£975 GBP
View
Retailer 14
-
$1,907 CAD
$1,365 USD
View
Price last confirmed 12 days ago
Most Expensive
B
Brilliant Earth
21312060A · Oct 30
$1,914 CAD
$1,370 USD
View
14 more retailers have this diamond
Prices start from $348 CADSave up to $1,566 CAD

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
$348 CAD