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Marquise|Lab Grown|IGI

1.21ct E IF Marquise Lab Grown Diamond

ID • E/IF • IGI LG681583490

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG681583490

Diamond specifications and retailer prices

From $408 USD
As of October 30, 2026
Save $1,612 USD (80%) vs most expensive(unlock to see where)
22 retailers carry this diamond
Most expensive: $2,020 USD at Brilliant Earth · As of October 30, 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 E colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG681583490 or 681583490. Listed at 22 retailers as of October 30, 2026, with prices from $408 to $2,020, a $1,612 spread on the same certified stone. Brilliant Earth lists it at $2,020. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.21
Carat
E
Color
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.2°
Pavilion angle40.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG681583490
Dimensions10.98 × 5.56 × 3.46 mm
L/W Ratio1.97
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
10.98 mm5.56 mm1.21 ctE / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG681583490
Side View
Table 57.0%Crown 33.2°Girdle: STK-THKPavilion 40.1°Culet: NoneDepth 62.2%

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: Oct 30
Current: $2,020 USD|Low: $456 USD|High: $2,563 USD|Avg: $1,204 USD|-1.5%
Brilliant Earth
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
Retailer 18
Retailer 19
October 30, 2026
Retailer 8$456 USD
Retailer 3$506 USD
Retailer 4$550 USD
Retailer 13$655 USD
Retailer 7$736 USD
Retailer 9$802 USD
Retailer 14$806 USD
Retailer 2$833 USD
Retailer 19$841 USD
Retailer 12$870 USD
Retailer 18$1,421 USD
Retailer 5$1,478 USD
Retailer 11$1,611 USD
Retailer 16$1,620 USD
Retailer 17$1,628 USD
Retailer 6$1,663 USD
Retailer 10$1,859 USD
Retailer 15$1,981 USD
Brilliant Earth$2,020 USD

41 data points across 19 retailers

22 retailers$408 USD to $2,020 USD

A
Cheapest Retailer
-
$408 USD
A
Retailer 2
-
$456 USD
View
Final sale: no returns
A
Retailer 3
-
$457 USD
View
A
Retailer 4
-
$506 USD
View
A
Retailer 5
-
$506 USD
View
A
Retailer 6
-
$550 USD
HK$4,300 HKD
View
A
Retailer 7
-
$655 USD
View
A
Retailer 8
-
$736 USD
View
B+
Retailer 9
-
$802 USD
View
B+
Retailer 10
-
$806 USD
€768 EUR
View
B+
Retailer 11
-
$833 USD
£656 GBP
View
B+
Retailer 12
-
$841 USD
View
B+
Retailer 13
-
$870 USD
ZAR 14,060 ZAR
View
B
Retailer 14
-
$1,421 USD
View
B
Retailer 15
-
$1,478 USD
£1,164 GBP
View
B
Retailer 16
-
$1,611 USD
SGD 2,177 SGD
View
B+
Retailer 17
-
$1,620 USD
View
B
Retailer 18
-
$1,628 USD
View
B
Retailer 19
-
$1,663 USD
View
B
Retailer 20
-
$1,859 USD
View
B
Retailer 21
-
$1,981 USD
£1,560 GBP
View
Most Expensive
B
Brilliant Earth
19056507A · Oct 30
$2,020 USD
View
21 more retailers have this diamond
Prices start from $408 USDSave up to $1,612 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
$408 USD