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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 $532 USD
As of November 4, 2026
Save $2,428 USD (82%) vs most expensive(unlock to see where)
23 retailers carry this diamond
Most expensive: $2,960 USD 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 $532 to $2,960, a $2,428 spread on the same certified stone. Brilliant Earth lists it at $2,960. 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

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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 4
Current: $2,960 USD|Low: $511 USD|High: $2,960 USD|Avg: $1,358 USD
Brilliant Earth
Retailer 2
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Retailer 12
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Retailer 18
November 5, 2026
Retailer 17$532 USD
Retailer 9$595 USD
Retailer 6$596 USD
Retailer 3$660 USD
Retailer 14$795 USD
Retailer 8$867 USD
Retailer 15$1,003 USD
Retailer 11$1,008 USD
Retailer 5$1,022 USD
Retailer 12$1,138 USD
Retailer 18$1,585 USD
Retailer 13$1,609 USD
Retailer 16$1,704 USD
Retailer 4$1,737 USD
Retailer 10$1,920 USD
Retailer 7$2,087 USD
Retailer 2$2,748 USD
Brilliant Earth$2,960 USD

44 data points across 18 retailers

23 retailers$532 USD to $2,960 USD

A
Cheapest Retailer
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$532 USD
A
Retailer 2
-
$595 USD
View
Final sale: no returns
A
Retailer 3
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$596 USD
View
Retailer 4
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$660 USD
View
Price last confirmed 20 days ago
A
Retailer 5
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$660 USD
View
A
Retailer 6
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$716 USD
View
B+
Retailer 7
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$795 USD
View
B+
Retailer 8
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$866 USD
View
B+
Retailer 9
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$867 USD
View
Retailer 10
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$1,003 USD
View
Price last confirmed 9 days ago
B+
Retailer 11
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$1,008 USD
View
B+
Retailer 12
-
$1,022 USD
View
B+
Retailer 13
-
$1,138 USD
View
Retailer 14
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$1,585 USD
View
Price last confirmed 29 days ago
B
Retailer 15
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$1,609 USD
View
B
Retailer 16
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$1,704 USD
View
B
Retailer 17
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$1,737 USD
View
B
Retailer 18
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$1,920 USD
View
B
Retailer 19
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$2,087 USD
View
B
Retailer 20
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$2,144 USD
View
B
Retailer 21
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$2,254 USD
View
B
Retailer 22
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$2,748 USD
View
Most Expensive
B
Brilliant Earth
19082024A · Nov 4
$2,960 USD
View
22 more retailers have this diamond
Prices start from $532 USDSave up to $2,428 USD

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
$532 USD