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Radiant|Lab Grown|IGI

1.71ct H SI1 Radiant Lab Grown Diamond

ID • H/SI1 • IGI LG512231580

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

Certificate IGI LG512231580

Diamond specifications and retailer prices

From $1,523 CAD
$1,090 USD
As of October 30, 2026
Save $6,022 CAD (80%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $7,545 CAD at MOH London · As of October 27, 2026
View at MOH London

About this 1.71ct lab-grown radiant diamond

This 1.71ct lab-grown radiant sits in the one-and-a-half to two carat band, graded H colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG512231580 or 512231580. Listed at 11 retailers as of October 27, 2026, with prices from $1,523 to $7,545, a $6,022 spread on the same certified stone. MOH London lists it at $7,545. 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

1.71
Carat
H
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle47.1°
Pavilion angle30.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG512231580
Dimensions7.68 × 5.82 × 4.03 mm
L/W Ratio1.32
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
7.68 mm5.82 mm1.71 ctH / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG512231580
Side View
Table 68.0%Crown 47.1°Girdle: ThickPavilion 30.1°Culet: NoneDepth 69.2%

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 30
Current: $7,545 CAD|Low: $1,523 CAD|High: $7,625 CAD|Avg: $4,193 CAD|+0.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
October 30, 2026
Retailer 2$1,523 CAD
Retailer 5$2,547 CAD
Retailer 6$2,878 CAD
Retailer 9$2,901 CAD
Retailer 7$3,547 CAD
Retailer 4$4,146 CAD
Retailer 3$4,548 CAD
MOH London$7,545 CAD
Retailer 8$7,554 CAD

12 data points across 9 retailers

11 retailers$1,523 CAD to $7,545 CAD

A
Cheapest Retailer
-
$1,523 CAD
$1,090 USD
B+
Retailer 2
-
$2,274 CAD
$1,628 USD
View
B+
Retailer 3
-
$2,474 CAD
$1,771 USD
View
B+
Retailer 4
-
$2,547 CAD
$1,823 USD
View
Final sale: no returns
Retailer 5
-
$2,639 CAD
$1,889 USD
View
Price last confirmed 18 days ago
B+
Retailer 6
-
$2,639 CAD
$1,889 USD
View
B+
Retailer 7
-
$2,878 CAD
$2,060 USD
View
B
Retailer 8
-
$4,146 CAD
$2,968 USD
View
B
Retailer 9
-
$4,548 CAD
$3,256 USD
View
B
Retailer 10
-
$4,945 CAD
$3,540 USD
View
Most Expensive
B
MOH London
LG512231580 · Oct 27
$7,545 CAD
£4,253 GBP
View
10 more retailers have this diamond
Prices start from $1,523 CADSave up to $6,022 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
1.71ct Radiant
$1,523 CAD