Marquise|Lab Grown|IGI

1.21ct D IF Marquise Lab Grown Diamond

EX • D/IF • IGI LG843637937

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG843637937

Diamond specifications and retailer prices

From $269 USD
As of October 30, 2026
Save $1,891 USD (88%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $2,160 USD at Brilliant Earth · As of October 31, 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 LG843637937 or 843637937. Listed at 18 retailers as of October 30, 2026, with prices from $269 to $2,160, a $1,891 spread on the same certified stone. Brilliant Earth lists it at $2,160. 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 angle38.9°
Pavilion angle39.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG843637937
Dimensions11.35 × 5.33 × 3.33 mm
L/W Ratio2.13
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
11.35 mm5.33 mm1.21 ctD / IF
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG843637937
Side View
Table 60.0%Crown 38.9°Girdle: MED-STKPavilion 39.5°Culet: NoneDepth 62.5%

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: Oct 30
Current: $564 USD|Low: $269 USD|High: $1,687 USD|Avg: $816 USD
Retailer 1
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
Retailer 17
November 2, 2026
Retailer 9$269 USD
Retailer 10$298 USD
Retailer 17$330 USD
Retailer 13$340 USD
Retailer 12$445 USD
Retailer 15$490 USD
Retailer 1$564 USD
Retailer 14$633 USD
Retailer 16$655 USD
Retailer 4$775 USD
Retailer 7$1,025 USD
Retailer 2$1,062 USD
Retailer 5$1,113 USD
Retailer 3$1,165 USD
Retailer 11$1,323 USD
Retailer 6$1,646 USD
Retailer 8$1,687 USD

6 data points across 17 retailers

18 retailers$269 USD to $2,160 USD

A
Cheapest Retailer
-
$269 USD
A
Retailer 2
-
$298 USD
View
Final sale: no returns
A
Retailer 3
-
$330 USD
View
A
Retailer 4
-
$340 USD
£268 GBP
View
A
Retailer 5
-
$445 USD
View
A
Retailer 6
-
$490 USD
View
A
Retailer 7
-
$564 USD
ZAR 9,107 ZAR
View
A
Retailer 8
-
$633 USD
£498 GBP
View
A
Retailer 9
-
$655 USD
View
B+
Retailer 10
-
$775 USD
View
B+
Retailer 11
-
$1,025 USD
View
B+
Retailer 12
-
$1,062 USD
View
B+
Retailer 13
-
$1,113 USD
View
B+
Retailer 14
-
$1,165 USD
View
B
Retailer 15
-
$1,323 USD
£1,042 GBP
View
B
Retailer 16
-
$1,646 USD
SGD 2,224 SGD
View
B
Retailer 17
-
$1,687 USD
A$2,596 AUD
View
Most Expensive
B
Brilliant Earth
22406151A · Oct 31
$2,160 USD
View
17 more retailers have this diamond
Prices start from $269 USDSave up to $1,891 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
$269 USD