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Radiant|Lab Grown|IGI

1.23ct D FL Radiant Lab Grown Diamond

ID • D/FL • IGI LG811638351

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

Certificate IGI LG811638351

Diamond specifications and retailer prices

From $454 CAD
£256 GBP
As of November 1, 2026
Save $2,633 CAD (85%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: $3,325 CAD at Rare Carat · As of October 18, 2026
View at Rare Carat

About this 1.23ct lab-grown radiant diamond

This 1.23ct lab-grown radiant sits in the classic one-carat band, graded D colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG811638351 or 811638351. Listed at 8 retailers as of November 1, 2026, with a 580% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.23
Carat
D
Color
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle42.8°
Pavilion angle35.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG811638351
Dimensions7.72 × 5.28 × 3.61 mm
L/W Ratio1.46
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
7.72 mm5.28 mm1.23 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG811638351
Side View
Table 67.0%Crown 42.8°Girdle: MediumPavilion 35.6°Culet: NoneDepth 68.4%

Caratlytics Score

How it works →
A+
Exceptional
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: $3,325 CAD|Low: $364 CAD|High: $4,428 CAD|Avg: $1,528 CAD|+6.8%
Rare Carat
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
Retailer 15
Retailer 16
November 1, 2026
Retailer 4$364 CAD
Retailer 8$411 CAD
Retailer 9$454 CAD
Retailer 15$664 CAD
Retailer 13$676 CAD
Retailer 6$1,036 CAD
Retailer 3$1,059 CAD
Retailer 16$1,123 CAD
Retailer 7$1,164 CAD
Retailer 12$1,288 CAD
Retailer 14$1,494 CAD
Retailer 2$1,767 CAD
Retailer 5$2,115 CAD
Retailer 10$2,696 CAD
Retailer 11$3,087 CAD
Rare Carat$3,325 CAD

20 data points across 16 retailers

8 retailers$454 CAD to $3,087 CAD

A+
Cheapest Retailer
-
$454 CAD
£256 GBP
A
Retailer 2
-
$676 CAD
$484 USD
View
B+
Retailer 3
-
$1,288 CAD
$922 USD
View
B+
Retailer 4
-
$1,494 CAD
$1,069 USD
View
B+
Retailer 5
-
$1,767 CAD
£996 GBP
View
B
Retailer 6
-
$2,696 CAD
$1,930 USD
View
B
Retailer 7
-
$3,087 CAD
$2,210 USD
View
Most Expensive
Rare Carat
PD-223153 · Oct 18
$3,325 CAD
$2,380 USD
View
Price last confirmed 14 days ago
7 more retailers have this diamond
Prices start from $454 CADSave up to $2,633 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 Radiant
$454 CAD