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Round|Lab Grown|IGI

1.23ct G SI1 Round Lab Grown Diamond

EX • G/SI1 • IGI LG598307797

Shape and cutting style on the report: Round brilliant

Certificate IGI LG598307797

Diamond specifications and retailer prices

From $459 CAD
As of November 5, 2026
Save $940 CAD (67%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: $1,399 CAD at MOH London · As of November 2, 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 SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG598307797 or 598307797. Listed at 6 retailers as of November 2, 2026, with prices from $459 to $1,399, a $940 spread on the same certified stone. MOH London lists it at $1,399. 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
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32.6°
Pavilion angle41.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG598307797
Dimensions6.95 × 6.97 × 4.18 mm
L/W Ratio1.00
Girdle conditionFaceted
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
6.95 mm6.97 mm1.23 ctG / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG598307797
Side View
Table 59.0%Crown 32.6°Girdle: MediumPavilion 41.4°Culet: NoneDepth 60.0%

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 5
Current: $1,399 CAD|Low: $458 CAD|High: $1,417 CAD|Avg: $684 CAD|-0.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 6, 2026
Retailer 6$459 CAD
Retailer 4$493 CAD
Retailer 2$525 CAD
Retailer 3$531 CAD
Retailer 5$623 CAD
MOH London$1,399 CAD

39 data points across 6 retailers

6 retailers$459 CAD to $1,399 CAD

A
Cheapest Retailer
-
$459 CAD
B+
Retailer 2
-
$493 CAD
View
A
Retailer 3
-
$525 CAD
View
A
Retailer 4
-
$531 CAD
View
B+
Retailer 5
-
$623 CAD
View
Most Expensive
B
MOH London
LG598307797 · Nov 2
$1,399 CAD
£789 GBP
View
5 more retailers have this diamond
Prices start from $459 CADSave up to $940 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
$459 CAD