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Radiant|Lab Grown|IGI

1.21ct G SI1 Radiant Lab Grown Diamond

ID • G/SI1 • IGI LG534238077

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

Certificate IGI LG534238077

Diamond specifications and retailer prices

From $274 CAD
As of November 6, 2026
Save $1,142 CAD (81%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $1,511 CAD at B2C Jewels · As of October 26, 2026
View at B2C Jewels

About this 1.21ct lab-grown radiant diamond

This 1.21ct 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 LG534238077 or 534238077. Listed at 18 retailers as of November 5, 2026, with a 416% 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

1.21
Carat
G
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle41.4°
Pavilion angle30.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG534238077
Dimensions7.55 × 5.24 × 3.43 mm
L/W Ratio1.44
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
7.55 mm5.24 mm1.21 ctG / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG534238077
Side View
Table 64.0%Crown 41.4°Girdle: Slightly ThickPavilion 30.1°Culet: NoneDepth 65.5%

Caratlytics Score

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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 6
Current: $1,511 CAD|Low: $274 CAD|High: $1,511 CAD|Avg: $742 CAD|+4.6%
B2C Jewels
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 6, 2026
Retailer 11$274 CAD
Retailer 10$304 CAD
Retailer 3$411 CAD
Retailer 2$537 CAD
Retailer 8$556 CAD
Retailer 7$563 CAD
Retailer 9$865 CAD
Retailer 6$1,031 CAD
Retailer 4$1,182 CAD
Retailer 5$1,416 CAD
B2C Jewels$1,511 CAD

42 data points across 11 retailers

18 retailers$274 CAD to $1,416 CAD

Retailer 1
-
$235 CAD
Price last confirmed 33 days ago
A
Retailer 2
-
$274 CAD
View
Final sale: no returns
Retailer 3
-
$300 CAD
View
Price last confirmed 43 days ago
Retailer 4
-
$304 CAD
View
Price last confirmed 35 days ago
B+
Retailer 5
-
$411 CAD
View
A
Retailer 6
-
$537 CAD
View
A
Retailer 7
-
$556 CAD
View
A
Retailer 8
-
$563 CAD
View
B+
Retailer 9
-
$771 CAD
View
Retailer 10
-
$865 CAD
View
Price last confirmed 31 days ago
B
Retailer 11
-
$881 CAD
View
B+
Retailer 12
-
$928 CAD
View
B
Retailer 13
-
$996 CAD
View
B
Retailer 14
-
$1,031 CAD
View
B
Retailer 15
-
$1,052 CAD
View
B
Retailer 16
-
$1,182 CAD
View
B
Retailer 17
-
$1,416 CAD
View
Most Expensive
B2C Jewels
20884917 · Oct 26
$1,511 CAD
$1,074 USD
View
Price last confirmed 11 days ago
17 more retailers have this diamond
Prices start from $274 CADSave up to $1,142 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
1.21ct Radiant
$274 CAD