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Marquise|Lab Grown|IGI

1.21ct F VS1 Marquise Lab Grown Diamond

ID • F/VS1 • IGI LG831628716

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG831628716

Diamond specifications and retailer prices

From $189 USD
As of November 4, 2026
Save $969 USD (84%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $1,702 USD at Queensmith · As of October 27, 2026
View at Queensmith

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 LG831628716 or 831628716. Listed at 19 retailers as of November 4, 2026, with a 513% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.9°
Pavilion angle40.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG831628716
Dimensions10.50 × 5.61 × 3.60 mm
L/W Ratio1.87
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
10.50 mm5.61 mm1.21 ctF / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG831628716
Side View
Table 57.0%Crown 34.9°Girdle: STK-THKPavilion 40.4°Culet: NoneDepth 64.2%

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: $421 USD|Low: $182 USD|High: $1,109 USD|Avg: $471 USD|+2.4%
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
November 5, 2026
Retailer 2$189 USD
Retailer 7$211 USD
Retailer 5$219 USD
Retailer 3$234 USD
Retailer 6$234 USD
Retailer 13$315 USD
Retailer 14$399 USD
Retailer 9$404 USD
Retailer 1$421 USD
Retailer 8$572 USD
Retailer 10$665 USD
Retailer 12$679 USD
Retailer 4$754 USD
Retailer 15$756 USD
Retailer 11$1,102 USD

45 data points across 15 retailers

19 retailers$189 USD to $1,158 USD

A
Cheapest Retailer
-
$189 USD
A
Retailer 2
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$211 USD
View
Final sale: no returns
A
Retailer 3
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$219 USD
View
Retailer 4
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$234 USD
View
Price last confirmed 12 days ago
A
Retailer 5
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$234 USD
View
B+
Retailer 6
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$315 USD
View
Retailer 7
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$399 USD
View
Price last confirmed 10 days ago
A
Retailer 8
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$404 USD
View
A
Retailer 9
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$421 USD
View
A
Retailer 10
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$437 USD
View
B+
Retailer 11
-
$572 USD
View
B+
Retailer 12
-
$665 USD
View
Retailer 13
-
$679 USD
View
Price last confirmed 9 days ago
B+
Retailer 14
-
$754 USD
View
B+
Retailer 15
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$756 USD
View
B+
Retailer 16
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$807 USD
View
Retailer 17
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$1,102 USD
View
Price last confirmed 8 days ago
B
Retailer 18
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$1,158 USD
View
Most Expensive
Queensmith
LG831628716 · Oct 27
$1,702 USD
£1,340 GBP
View
Price last confirmed 9 days ago
18 more retailers have this diamond
Prices start from $189 USDSave up to $969 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
$189 USD