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Marquise|Lab Grown|IGI

1.21ct D IF Marquise Lab Grown Diamond

EX • D/IF • IGI LG790612052

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG790612052

Diamond specifications and retailer prices

From $743 CAD
As of November 4, 2026
Save $3,391 CAD (82%) vs most expensive(unlock to see where)
23 retailers carry this diamond
Most expensive: $4,134 CAD at Brilliant Earth · As of November 4, 2026
View at Brilliant Earth

About this 1.21ct lab-grown marquise diamond

This 1.21ct lab-grown marquise sits in the classic one-carat band, graded D colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG790612052 or 790612052. Listed at 23 retailers as of November 4, 2026, with prices from $743 to $4,134, a $3,391 spread on the same certified stone. Brilliant Earth lists it at $4,134. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.21
Carat
D
Color
IF
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.7°
Pavilion angle40.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG790612052
Dimensions10.72 × 5.61 × 3.54 mm
L/W Ratio1.91
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
10.72 mm5.61 mm1.21 ctD / IF
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG790612052
Side View
Table 56.0%Crown 34.7°Girdle: MED-STKPavilion 40.1°Culet: NoneDepth 63.2%

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: $4,134 CAD|Low: $714 CAD|High: $4,134 CAD|Avg: $1,897 CAD
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
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Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
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Retailer 17
Retailer 18
November 5, 2026
Retailer 17$743 CAD
Retailer 9$831 CAD
Retailer 6$832 CAD
Retailer 3$922 CAD
Retailer 14$1,110 CAD
Retailer 8$1,211 CAD
Retailer 15$1,401 CAD
Retailer 11$1,408 CAD
Retailer 5$1,427 CAD
Retailer 12$1,589 CAD
Retailer 18$2,214 CAD
Retailer 13$2,247 CAD
Retailer 16$2,380 CAD
Retailer 4$2,426 CAD
Retailer 10$2,681 CAD
Retailer 7$2,915 CAD
Retailer 2$3,838 CAD
Brilliant Earth$4,134 CAD

44 data points across 18 retailers

23 retailers$743 CAD to $4,134 CAD

A
Cheapest Retailer
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$743 CAD
A
Retailer 2
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$831 CAD
View
Final sale: no returns
A
Retailer 3
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$832 CAD
View
Retailer 4
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$922 CAD
View
Price last confirmed 20 days ago
A
Retailer 5
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$922 CAD
View
A
Retailer 6
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$1,000 CAD
View
B+
Retailer 7
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$1,110 CAD
View
B+
Retailer 8
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$1,209 CAD
View
B+
Retailer 9
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$1,211 CAD
View
Retailer 10
-
$1,401 CAD
View
Price last confirmed 9 days ago
B+
Retailer 11
-
$1,408 CAD
View
B+
Retailer 12
-
$1,427 CAD
View
B+
Retailer 13
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$1,589 CAD
View
Retailer 14
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$2,214 CAD
View
Price last confirmed 29 days ago
B
Retailer 15
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$2,247 CAD
View
B
Retailer 16
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$2,380 CAD
View
B
Retailer 17
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$2,426 CAD
View
B
Retailer 18
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$2,681 CAD
View
B
Retailer 19
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$2,915 CAD
View
B
Retailer 20
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$2,994 CAD
View
B
Retailer 21
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$3,148 CAD
View
B
Retailer 22
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$3,838 CAD
View
Most Expensive
B
Brilliant Earth
19082024A · Nov 4
$4,134 CAD
$2,960 USD
View
22 more retailers have this diamond
Prices start from $743 CADSave up to $3,391 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 Marquise
$743 CAD