Marquise|Lab Grown|IGI

1.21ct F VS1 Marquise Lab Grown Diamond

EX • F/VS1 • IGI LG831685819

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG831685819

Diamond specifications and retailer prices

From $362 USD
As of November 5, 2026
Save $668 USD (65%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $1,030 USD at Frank Darling · As of November 5, 2026
View at Frank Darling

About this 1.21ct lab-grown marquise diamond

This 1.21ct lab-grown marquise sits in the classic one-carat band, graded F colour (colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG831685819 or 831685819. Listed at 9 retailers as of November 5, 2026, with prices from $362 to $1,030, a $668 spread on the same certified stone. Frank Darling lists it at $1,030. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.21
Carat
F
Color
VS1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.2°
Pavilion angle41.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG831685819
Dimensions10.77 × 5.56 × 3.54 mm
L/W Ratio1.94
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
10.77 mm5.56 mm1.21 ctF / VS1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG831685819
Side View
Table 61.0%Crown 35.2°Girdle: MED-STKPavilion 41.8°Culet: NoneDepth 63.7%

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 5
Current: $1,030 USD|Low: $362 USD|High: $1,030 USD|Avg: $509 USD
Frank Darling
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 5, 2026
Retailer 7$362 USD
Retailer 9$365 USD
Retailer 12$385 USD
Retailer 10$403 USD
Retailer 11$431 USD
Retailer 8$523 USD
Retailer 3$552 USD
Retailer 5$658 USD
Retailer 2$697 USD
Retailer 6$743 USD
Retailer 4$792 USD
Frank Darling$1,030 USD

13 data points across 12 retailers

9 retailers$362 USD to $1,030 USD

A
Cheapest Retailer
-
$362 USD
A
Retailer 2
-
$365 USD
View
A
Retailer 3
-
$403 USD
View
Retailer 4
-
$523 USD
View
Price last confirmed 10 days ago
B+
Retailer 5
-
$592 USD
View
Retailer 6
-
$670 USD
View
Price last confirmed 37 days ago
B+
Retailer 7
-
$697 USD
View
B+
Retailer 8
-
$743 USD
View
Most Expensive
B
Frank Darling
100197152230BD · Nov 5
$1,030 USD
View
8 more retailers have this diamond
Prices start from $362 USDSave up to $668 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
$362 USD