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Round|Lab Grown|IGI

1.23ct G SI2 Round Lab Grown Diamond

ID • G/SI2 • IGI LG490195521

Shape and cutting style on the report: Round brilliant

Certificate IGI LG490195521

Diamond specifications and retailer prices

From $331 CAD
As of November 4, 2026
Save $1,246 CAD (79%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: $1,577 CAD at MOH London · As of November 5, 2026
View at MOH London

About this 1.23ct lab-grown round diamond

This 1.23ct lab-grown round sits in the classic one-carat band, graded G colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG490195521 or 490195521. Listed at 8 retailers as of November 4, 2026, with prices from $331 to $1,577, a $1,246 spread on the same certified stone. MOH London lists it at $1,577. 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

1.23
Carat
G
Color
SI2
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.4°
Pavilion angle41.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG490195521
Dimensions7.02 × 6.98 × 4.19 mm
L/W Ratio1.01
Girdle conditionFaceted
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
7.02 mm6.98 mm1.23 ctG / SI2
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG490195521
Side View
Table 59.0%Crown 33.4°Girdle: THN-MEDPavilion 41.1°Culet: NoneDepth 59.9%

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: Nov 4
Current: $1,577 CAD|Low: $236 CAD|High: $1,589 CAD|Avg: $665 CAD|+7.2%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 6, 2026
Retailer 8$331 CAD
Retailer 6$338 CAD
Retailer 4$413 CAD
Retailer 3$573 CAD
Retailer 7$589 CAD
Retailer 2$609 CAD
Retailer 5$786 CAD
MOH London$1,577 CAD

41 data points across 8 retailers

8 retailers$331 CAD to $1,577 CAD

A
Cheapest Retailer
-
$331 CAD
Final sale: no returns
Retailer 2
-
$338 CAD
View
Price last confirmed 21 days ago
A
Retailer 3
-
$413 CAD
View
B+
Retailer 4
-
$573 CAD
View
B+
Retailer 5
-
$589 CAD
View
B+
Retailer 6
-
$609 CAD
View
B
Retailer 7
-
$786 CAD
View
Most Expensive
B
MOH London
LG490195521 · Nov 5
$1,577 CAD
£889 GBP
View
7 more retailers have this diamond
Prices start from $331 CADSave up to $1,246 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
1.23ct Round
$331 CAD