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Radiant|Lab Grown|IGI

1.23ct G SI1 Radiant Lab Grown Diamond

ID • G/SI1 • IGI LG514255275

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

Certificate IGI LG514255275

Diamond specifications and retailer prices

From $942 CAD
As of November 6, 2026
Save $997 CAD (51%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $3,365 CAD at NZ Jewellers · As of November 6, 2026
View at NZ Jewellers

About this 1.23ct lab-grown radiant diamond

This 1.23ct lab-grown radiant 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 LG514255275 or 514255275. Listed at 13 retailers as of November 4, 2026, with a 106% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle41.2°
Pavilion angle32.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG514255275
Dimensions7.25 × 5.53 × 3.53 mm
L/W Ratio1.31
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
7.25 mm5.53 mm1.23 ctG / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG514255275
Side View
Table 61.5%Crown 41.2°Girdle: Slightly ThickPavilion 32.3°Culet: NoneDepth 63.8%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: $1,896 CAD|Low: $942 CAD|High: $4,761 CAD|Avg: $1,958 CAD|-0.4%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 6, 2026
Retailer 3$942 CAD
Retailer 6$1,031 CAD
Retailer 9$1,153 CAD
Retailer 7$1,197 CAD
Retailer 4$1,449 CAD
Retailer 1$1,896 CAD
Retailer 8$1,940 CAD
Retailer 5$2,948 CAD
Retailer 2$4,687 CAD

42 data points across 9 retailers

13 retailers$942 CAD to $1,940 CAD

B+
Cheapest Retailer
-
$942 CAD
B
Retailer 2
-
$1,031 CAD
View
B
Retailer 3
-
$1,122 CAD
View
B
Retailer 4
-
$1,153 CAD
View
Final sale: no returns
B
Retailer 5
-
$1,197 CAD
View
Retailer 6
-
$1,197 CAD
View
Price last confirmed 26 days ago
B
Retailer 7
-
$1,449 CAD
View
B
Retailer 8
-
$1,896 CAD
View
B
Retailer 9
-
$1,940 CAD
View
Retailer 10
-
$2,948 CAD
View
Price under review
Most Expensive
NZ Jewellers
608f19aa-4b90-4042-a34e-5575f5ee5aa6 · Nov 6
$3,365 CAD
$2,392 USD
View
Price under review
10 more retailers have this diamond
Prices start from $942 CADSave up to $997 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.

B+
1.23ct Radiant
$942 CAD